Proverbs 15:8

The sacrifice of the wicked is an abomination to the Lord. — And their prayers also (Isaiah 1:11). The worthlessness of sacrifice without obedience (comp. 1 Samuel 15:22) may be here especially mentioned, because men are apt to think that what involves cost and trouble must be pleasing to God, even when not accompanied with what alone He cares for, a loving heart.

The prayer of the upright is his delight. — Even when offered by itself, without sacrifice.