11 What to me is the multitude of your sacrifices? says the Lord; I have had enough of burnt offerings of rams and the fat of fed beasts; I do not delight in the blood of bulls, or of lambs, or of goats. 12 When you come to appear before me, [1] who asked this from your hand? Trample my courts no more; 13 bringing offerings is futile; incense is an abomination to me. New moon and sabbath and calling of convocation- I cannot endure solemn assemblies with iniquity. 14 Your new moons and your appointed festivals my soul hates; they have become a burden to me, I am weary of bearing them. 15 When you stretch out your hands, I will hide my eyes from you; even though you make many prayers, I will not listen; your hands are full of blood.

Matthew Henry's Commentary on Isaiah 1:11-15

Commentary on Isaiah 1:10-15

(Read Isaiah 1:10-15)

Judea was desolate, and their cities burned. This awakened them to bring sacrifices and offerings, as if they would bribe God to remove the punishment, and give them leave to go on in their sin. Many who will readily part with their sacrifices, will not be persuaded to part with their sins. They relied on the mere form as a service deserving a reward. The most costly devotions of wicked people, without thorough reformation of heart and life, cannot be acceptable to God. He not only did not accept them, but he abhorred them. All this shows that sin is very hateful to God. If we allow ourselves in secret sin, or forbidden indulgences; if we reject the salvation of Christ, our very prayers will become abomination.