Albert Barnes Commentary Jeremiah 15:11

"Jehovah said, Verily I will strengthen thee for good; verily I will cause the enemy to make supplication unto thee in the time of evil and in the time of affliction." — Jeremiah 15:11 (ASV)

Shall be well with thy remnant - Or, your release shall be for good; in the sense of being set free, deliverance.

To entreat thee well ... - Rather, “to supplicate you in the time of evil etc.;” fulfilled in Jeremiah 21:1-2; Jeremiah 37:3; Jeremiah 42:2.