Albert Barnes Commentary 2 Kings 6:29

"So we boiled my son, and did eat him: and I said unto her on the next day, Give thy son, that we may eat him; and she hath hid her son." — 2 Kings 6:29 (ASV)

The prophecy alluded to in the marginal references was now fulfilled, probably for the first time. It had a second accomplishment when Jerusalem was besieged by Nebuchadnezzar (Lamentations 4:10), and a third in the final siege of the same city by Titus.