Widows are protected in Islam from their in-laws, but are forced and not protected in the Bible's NT and OT.

2- Polygamy in the New Testament:

Jesus said: "Do not think that I have come to abolish the Law (the Old Testament) or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke or a pen, will by any means disappear from the Law (the Old Testament) until everything is accomplished. (Matthew 5:17-18)"

There is not a single verse from the New Testament that prohibits polygamy. Let us look at the following:

1 Corinthians 7
10 I instruct married couples to stay together, and this is exactly what the Lord himself taught. A wife who leaves her husband
11 should either stay single or go back to her husband. And a husband should not leave his wife.

Notice, no command for the husband to "remain single". This is because he can marry another single woman at any time (see also Luke 2:52: GOD forgave Jesus).

Matthew 5:31-32
31 "It has been said, 'Anyone who divorces his wife must give her a certificate of divorce.'
32 But I tell you that anyone who divorces his wife, except for marital unfaithfulness, causes her to become an adulteress, and anyone who marries the divorced woman commits adultery.

A man can marry multiple women, while the woman can only marry one man. Here Jesus warns that unlawful divorces will cause women to commit adultery, because they would still be married to their first husbands.

Matthew 19:1-12 "1. When Jesus had finished saying these things, he left Galilee and went into the region of Judea to
the other side of the Jordan.
2. Large crowds followed him, and he healed them there.
3. Some Pharisees came to him to test him. They asked, "Is it lawful for a man to divorce his wife for any and every reason?"
4. "Haven't you read," he (Jesus) replied, "that at the beginning the Creator `made them male and female,'
5. and said, `For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh' ?
6. So they are no longer two, but one. Therefore what God has joined together, let man not separate."
7. "Why then," they asked, "did Moses command that a man give his wife a certificate of divorce and send her away?"
8. Jesus replied, "Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning.
9. I tell you that anyone who divorces his wife, except for marital unfaithfulness, and marries another woman commits adultery."

Below, I've amply proven that this verse here, Matthew 19:9, is either a punishment or a restriction for an unauthorized divorce. It is not a general Law that applies to all believing men as the other sayings from Jesus clearly prove. Jesus also explained this verse, Matthew 19:9, much better in:

10. The disciples said to him, "If this is the situation between a husband and wife, it is better not to marry."
11. Jesus replied, "Not everyone can accept this word, but only those to whom it has been given.
12. For some are eunuchs because they were born that way; others were made that way by men; and others have renounced marriage because of the kingdom of heaven. The one who can accept this should accept it."

In the above verses, we see that Jesus was approached with a question about whether or not it is allowed for a man to divorce his wife in Matthew 19:3. Jesus immediately referred to the Old Testament for the answer in Matthew 19:4. He referred to Adam and Eve, one man and one woman. The Old Testament does talk about the story of Adam and Eve as one husband and one wife. However, the Old Testament which Jesus had referred to in Matthew 19:3 does allow polygamy. Also, when a man becomes a one flesh with his wife in Matthew 19:5-6, this doesn't mean that the man can't be one flesh with another woman. He can be one flesh with his first wife, and one flesh with his second wife, and one flesh with his third wife and so on. Polygamy in not a sin:

2 Samuel 12:8
8. I gave your master's house to you, and your master's wives into your arms. I gave you the house of Israel and Judah. And if all this had been too little, I would have given you even more.

GOD Almighty here supposedly says that He gave to David Saul's wives, and GOD would have even given him more wives if he (David) wanted.

To further prove this point, let us look at the following from the New Testament:

Matthew 22:23-32 "23. That same day the Sadducees, who say there is no resurrection, came to him with a question.
24. "Teacher," they said, "Moses told us that if a man dies without having children, his brother must marry the widow and have children for him.
25. Now there were seven brothers among us. The first one married and died, and since he had no children, he left his wife to his brother.
26. The same thing happened to the second and third brother, right on down to the seventh.
27. Finally, the woman died.
28. Now then, at the resurrection, whose wife will she be of the seven, since all of them were married to her?"
29. Jesus replied, "You are in error because you do not know the Scriptures or the power of God (Luke 2:52: GOD forgave Jesus' sins and was "charitable" with him).
30. At the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven.
31. But about the resurrection of the dead--have you not read what God said to you,
32. `I am the God of Abraham, the God of Isaac, and the God of Jacob' ? He is not the God of the dead but of the living."

In Matthew 22:24-28, the Jews referred to Deuteronomy 25:5 from the Old Testament where it states that if a woman's husband dies, and she didn't have any kids from him, then she must marry his brother regardless whether he had a wife or not. When the Jews brought this situation up to Jesus in Matthew 22:24-28, Jesus did not prohibit at all for the childless widow to marry her husband's brother, even if here were already married. Instead, Jesus replied to them by saying that we do not marry at the resurrection (before Judgment), and we will be like angels in heaven (Matthew 22:30).

Resurrection or Heaven?

The resurrection is different from being in Heaven. We will all resurrect. But this is only the beginning. Some of us will be Judged by GOD Almighty to Hell, and some will be Judged to Heaven. In Heaven, will there be:

1- Sex? Will men have testicles and penises, sperms and semens? And will women have vaginas, eggs and wombs that can house fetuses?

2- Marriage? Will Adam and Eve, for example, be a husband and a wife in Heaven?

The Bible is silent about all of this.

If Jesus, during his stay on earth in that Jewish culture, allowed for a widow to marry her former husband's brother, even if he were already married, then this negates the Christians' claim about the Bible prohibiting polygamy. A man can be one flesh with more than one woman. In the case of Matthew 22:24-28, the man can be one flesh with his wife, and one flesh with his deceased brother's wife. Also keep in mind that Exodus 21:10 allows a man to marry an infinite amount of women, and Deuteronomy 21:15 allows a man to marry more than one wife.

Please visit: Widows are protected in Islam from their in-laws, but are forced and not protected in the Bible's NT and OT.

Matthew 19:9 is a punishment:

Matthew 19:9 above was clearly either a punishment or a restriction for an unauthorized divorce, because otherwise if the man does marry another woman, - while keeping the first wife, - then he would not be committing adultery. Remember that Jesus said:

"Do not think that I have come to abolish the Law (the Old Testament) or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke or a pen, will by any means disappear from the Law (the Old Testament) until everything is accomplished. (Matthew 5:17-18)"

And we know that the Law does allow polygamy. GOD Almighty even Said that He would've given David more wives if the ones he had weren't enough.