Charles Ellicott Commentary Jeremiah 11:5

"that I may establish the oath which I sware unto your fathers, to give them a land flowing with milk and honey, as at this day. Then answered I, and said, Amen, O Jehovah." — Jeremiah 11:5 (ASV)

A land flowing with milk and honey. This description appears for the first time in Exodus 3:8; Exodus 3:17. It rapidly became proverbial and is prominent in Deuteronomy 6:3 and Joshua 5:6. It points primarily, it should be noted, to the plenty of a pastoral rather than an agricultural people (see Note on Isaiah 7:22), and thus to the earlier rather than the later stages of the life of Israel.

So be it, O Lord. This is the Amen of the liturgies and litanies of Israel, probably brought into fresh prominence by Deuteronomy 27:15-26, and uttered by princes and people in the solemn ceremonial of 2 Kings 23:3.