Charles Ellicott Commentary Jeremiah 20:13

"Sing unto Jehovah, praise ye Jehovah; for he hath delivered the soul of the needy from the hand of evil-doers." — Jeremiah 20:13 (ASV)

Sing to the Lord ... —It was as though heaviness had endured for a night, and joy had come in the morning. As with so many of the Psalms (Psalms 22:22 is, perhaps, the most striking parallel), what began in a cry De profundis ends in a Hallelujah.