This was according to what God had threatened in case of disobedience, Deuteronomy 28:57, and a thing which hath often happened in sieges, 2 Kings 6:29. Such things did happen in the last destruction of Jerusalem, as we read in Josephus; and though we read of no such thing happening in the siege of it by Nebuchadnezzar, yet that there were some such sad instances appears from this text.
Related Commentaries of Lamentations 4:10
Lamentations 4:10
10 The hands of the pitiful women have sodden their own children: they were their meat in the destruction of the daughter of my people.