Charles Ellicott Commentary Psalms 56:12

"Thy vows are upon me, O God: I will render thank-offerings unto thee." — Psalms 56:12 (ASV)

Your vows — that is, vows made to You, but the form is most unusual. For the thought compare Psalms 22:25; Psalms 50:14.

I will render — that is, in fulfilment of the vows.