Both holy books have specific instructions for a husband that suspects his wife has been unfaithful. Since over half of the world believes in one or the other, I thought it would be good to compare them here.
The Bible's instructions are in Numbers 5.
The first thing to notice about them is that these instructions are from God. It's not just Moses telling the people what to do; it's God.
The LORD spake unto Moses, saying, Speak unto the children of Israel, and say unto them, If any man's wife go aside, and commit a trespass against him, And a man lie with her carnally, and it be hid from the eyes of her husband ... and she be defiled, and there be no witness against her. Numbers 5:11-13
And notice, too, that the husband has no evidence here, only suspicion and jealousy. He didn't see his wife with another man and no one else did either.
So what does God tell the jealous husband to do?
Take her to a priest who will force her to drink some "bitter water."
Then shall the man bring his wife unto the priest ... And the priest shall ... set her before the LORD ... And he shall cause the woman to drink the bitter water. Numbers 5:15-24
If she is guilty, the bitter water will "make her thigh rot and her belly swell," and she will "become a curse among her people."
When he hath made her to drink the water, then ... if she be defiled, and have done trespass against her husband, ... her belly shall swell, and her thigh shall rot: and the woman shall be a curse among her people. Numbers 5:27
But if the woman is innocent, then the bitter water won't cause her belly to swell and her thigh to rot, and she'll get pregnant. (Apparently, the swollen belly and the rotted thigh was God's way of giving an unfaithful wife an abortion -- or worse.)
If the woman be not defiled, but be clean; then she shall be free, and shall conceive seed. Numbers 5:28
In any case, whether she passes or fails the bitter water, belly swelling, thigh rotting, holy abortion test, the husband is completely blameless. But "the woman shall bear her iniquity."
Then shall the man be guiltless from iniquity, and this woman shall bear her iniquity. Numbers 5:31
OK. That's it. That's what God says a man should do if he suspects that his wife has been unfaithful.
Boy, that's going to be hard to beat! But let's see what the Quran says about it.
Luckily, the Quran deals with the same situation: a man who suspects that his wife has been unfaithful. Except that here the husband claims to be a witness of his wife's infidelity.
For those who accuse their wives but have no witnesses except themselves... Quran 24:6a
Now you might think that would be enough to prove the wife's adultery, but it isn't, becaue just two verses ago, the Quran says that four witnesses are required to convict a wife of adultery.
Those who accuse honourable women but bring not four witnesses, scourge them (with) eighty stripes and never (afterward) accept their testimony - They indeed are evil-doers. Quran 24:4
So what's a husband to do in this case? Well, Allah has that all figured out. The husband can just swear that it's true four separate times and that way he can serve as four separate witnesses.
For those who accuse their wives but have no witnesses except themselves let the testimony of one of them be four testimonies, (swearing) by Allah that he is of those who speak the truth. Quran 24:6
How cool is that?
Oh and then, swear one more time, just to make it all official llke. And this time ask Allah to curse you if you are lying. That ought to do it. (It's sort of like saying, "Cross my heart and hope to die" when swearing. No one would lie doing that!)
And yet a fifth, invoking the curse of Allah on him if he is of those who lie. Quran 24:7
So now there are five witnesses and we can get on with the punishment.
The woman can appeal the case, though, by swearing five times that she is innocent.
And it shall avert the punishment from her if she bear witness before Allah four times that the thing he saith is indeed false, And a fifth (time) that the wrath of Allah be upon her if he speaketh truth. Quran 24:8-9
I don't know what happens then. What do you do when you have two people that cross their hearts and hope to die on opposite sides of the same case? The Quran doesn't say and I don't think the Supreme Court has ever had a case like that.
So that's what the Bible and the Quran say a husband should do with an unfaithful wife.
Which procedure do you think is the best?