As thou hast said, so must we do - They all resolved to do what Ezra then commanded, they did put away their wives, even those by whom they had children; Ezra 10:44 : this was a great hardship on the women and children. Though by the Jewish laws such marriages were null and void, yet as the women they had taken did not know these laws, their case was deplorable. However, we may take it for granted that each of them received a portion according to the circumstances of their husbands, and that they and their children were not turned away desolate, but had such a provision as their necessities required. Humanity must have dictated this, and no law of God is contrary to humanity. After all, there is some room to doubt whether they did put them finally away, for several years after Nehemiah found Jews that had married wives of Ashdod, Ammon, and Moab; Nehemiah 13:23. And if these were not the same women, we find that the same offense was continued.

to examine the matter

Deuteronomy 13:14 Then shall you inquire, and make search, and ask diligently; and, behold, if it be truth, and the thing certain...

Job 29:16 I was a father to the poor: and the cause which I knew not I searched out.

John 7:51 Does our law judge any man, before it hear him, and know what he does?

The Old Testament Canon from Its Beginning to Its Close.
The first important part of the Old Testament put together as a whole was the Pentateuch, or rather, the five books of Moses and Joshua. This was preceded by smaller documents, which one or more redactors embodied in it. The earliest things committed to writing were probably the ten words proceeding from Moses himself, afterwards enlarged into the ten commandments which exist at present in two recensions (Exod. xx., Deut. v.) It is true that we have the oldest form of the decalogue from the Jehovist …
Samuel Davidson—The Canon of the Bible