10Hear the word of the LORD, ye rulers of Sodom; give ear unto the law of our God, ye people of Gomorrah.
11To what purpose is the multitude of your sacrifices unto me? saith the LORD: I am full of the burnt offerings of rams, and the fat of fed beasts; and I delight not in the blood of bullocks, or of lambs, or of he goats.
12When ye come to appear before me, who hath required this at your hand, to tread my courts?
13Bring no more vain oblations; incense is an abomination unto me; the new moons and sabbaths, the calling of assemblies, I cannot away with; it is iniquity, even the solemn meeting.
14Your new moons and your appointed feasts my soul hateth: they are a trouble unto me; I am weary to bear them.
15And when ye spread forth your hands, I will hide mine eyes from you: yea, when ye make many prayers, I will not hear: your hands are full of blood.
16Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil;
17Learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow.
God compares mistreating widows and orphans (those who could not defend themselves) as being evil as the sins of Sodom and Gomorrah. God is not interested in Judah's sacrifice, prayers or offerings until this wrong is made right.
Verse 18Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
One of the most famous versus about God's forgiveness. It's comparable to 1 John 1:9 "If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness."
19If ye be willing and obedient, ye shall eat the good of the land:
20But if ye refuse and rebel, ye shall be devoured with the sword: for the mouth of the LORD hath spoken it.
A conditional promise based on obedience.
22Thy silver is become dross, thy wine mixed with water:
Dross is the worthless leftovers of the metal refining process. During that process all of the impurities in the metal rise to the top. There might be a little metal in the dross, but it's not worth trying to refine the dross to get it out. Dross is only good for the disposal heap.
23Thy princes are rebellious, and companions of thieves: every one loveth gifts, and followeth after rewards: they judge not the fatherless, neither doth the cause of the widow come unto them.
Another example of God speaking up for the widows and orphans.
24Therefore saith the LORD, the LORD of hosts, the mighty One of Israel, Ah, I will ease me of mine adversaries, and avenge me of mine enemies:
25And I will turn my hand upon thee, and purely purge away thy dross, and take away all thy tin:
God is again talking about taking away the dross. And here he mentions tin. Tin is a less valuable metal that is often used to make alloys with other metals. For example bronze is tin and copper. Tin and silver alloys are used as a lead free solder. God is looking for pure precious metal, not alloy.
26And I will restore thy judges as at the first, and thy counsellors as at the beginning: afterward thou shalt be called, The city of righteousness, the faithful city.
27Zion shall be redeemed with judgment, and her converts with righteousness.
28And the destruction of the transgressors and of the sinners shall be together, and they that forsake the LORD shall be consumed.
29For they shall be ashamed of the oaks which ye have desired, and ye shall be confounded for the gardens that ye have chosen.
This is referencing the oak groves that Judah had worshiped.
30For ye shall be as an oak whose leaf fadeth, and as a garden that hath no water.
31And the strong shall be as tow, and the maker of it as a spark, and they shall both burn together, and none shall quench them.