Charles Ellicott Commentary Jeremiah 15:18

"Why is my pain perpetual, and my wound incurable, which refuseth to be healed? wilt thou indeed be unto me as a deceitful [brook], as waters that fail?" — Jeremiah 15:18 (ASV)

Wilt thou be altogether unto me as a liar ...? — The words express a bitter sense of failure and disappointment. God had not prospered the mission of His servant as He had promised. The Hebrew, however, is not so startlingly bold as the English, and is satisfied by the rendering, wilt thou be unto me as a winter torrent, that is, as in Job 6:15, like one which flows only in that season and is dried up and parched in summer. See the play on the word achzib (that is, a lie) in Micah 1:14.