Psalms 50:7-15
7. I will testify—that is, for failure to worship aught.
thy God—and so, by covenant as well as creation, entitled to a pure worship.8-15. However scrupulous in external worship, it was offered as if they conferred an obligation in giving God His own, and with a degrading view of Him as needing it [Ps 50:9-13]. Reproving them for such foolish and blasphemous notions, He teaches them to offer, or literally, "sacrifice," thanksgiving, and pay, or perform, their vows—that is, to bring, with the external symbolical service, the homage of the heart, and faith, penitence, and love. To this is added an invitation to seek, and a promise to afford, all needed help in trouble.
Isaiah 1:11
11. God does not here absolutely disparage sacrifice, which is as old and universal as sin (Ge 3:21; 4:4), and sin is almost as old as the world; but sacrifice, unaccompanied with obedience of heart and life (1Sa 15:22; Ps 50:9-13; 51:16-19; Ho 6:6). Positive precepts are only means; moral obedience is the end. A foreshadowing of the gospel, when the One real sacrifice was to supersede all the shadowy ones, and "bring in everlasting righteousness" (Ps 40:6, 7; Da 9:24-27; Heb 10:1-14).
full—to satiety; weary of burnt offerings—burnt whole, except the blood, which was sprinkled about the altar. fat—not to be eaten by man, but burnt on the altar (Le 3:4, 5, 11, 17). Isaiah 1:17
17. seek judgment—justice, as magistrates, instead of seeking bribes (Jer 22:3, 16).
judge—vindicate (Ps 68:5; Jas 1:27).