11 What use to me is the number of the offerings which you give me? says the Lord; your burned offerings of sheep, and the best parts of fat cattle, are a weariness to me; I take no pleasure in the blood of oxen, or of lambs, or of he-goats. 12 At whose request do you come before me, making my house unclean with your feet? 13 Give me no more false offerings; the smoke of burning flesh is disgusting to me, so are your new moons and Sabbaths and your holy meetings. 14 Your new moons and your regular feasts are a grief to my soul: they are a weight in my spirit; I am crushed under them. 15 And when your hands are stretched out to me, my eyes will be turned away from you: even though you go on making prayers, I will not give ear: your hands are full of blood.

16 Be washed, make yourselves clean; put away the evil of your doings from before my eyes; let there be an end of sinning; 17 Take pleasure in well-doing; let your ways be upright, keep down the cruel, give a right decision for the child who has no father, see to the cause of the widow.

Matthew Henry's Commentary on Isaiah 1:11-17

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.

Commentary on Isaiah 1:16-20

(Read Isaiah 1:16-20)

Not only feel sorrow for the sin committed, but break off the practice. We must be doing, not stand idle. We must be doing the good the Lord our God requires. It is plain that the sacrifices of the law could not atone, even for outward national crimes. But, blessed be God, there is a Fountain opened, in which sinners of every age and rank may be cleansed. Though our sins have been as scarlet and crimson, a deep dye, a double dye, first in the wool of original corruption, and afterwards in the many threads of actual transgression; though we have often dipped into sin, by many backslidings; yet pardoning mercy will take out the stain, Psalm 51:7. They should have all the happiness and comfort they could desire. Life and death, good and evil, are set before us. O Lord, incline all of us to live to thy glory.