I will make them eat the flesh of their sons and daughters, and they will eat one another’s flesh in the siege and distress inflicted on them by their enemies who seek their lives.’
Here the Prophet goes farther — that so atrocious would be the calamity, that even fathers and mothers would not abstain from their children, but would devour their flesh. This was indeed monstrous. It has sometimes happened that husbands, in a state of extreme despondency, have killed their wives and children, (anxious to exempt them from the lust of enemies,) or have kindled a fire...
The corruption of man having made it necessary that precept should be upon precept, and line upon line (so unapt are we to receive, and so very apt to let slip, the things of God), the grace of God has provided that there shall be, accordingly, precept upon precept, and line upon line, that those who are irreclaimable may be inexcusable.
Commenting on Jeremiah 19:1-9
And I will cause them to eat the flesh of their sons, and the flesh of their daughters,.... For want of food; the famine should be so great and pressing. Jeremiah, that foretells this, was a witness of it, and has left it on record, Lam 4:10; and they shall eat everyone the flesh of his friend.