O Jerusalem, wash thine heart - Why do ye not put away your wickedness, that ye may be saved from these tremendous judgments? How long shall thy vain thoughts of safety and prosperity lodge within thee? Whilst thou continuest a rebel against God, and provokest him daily by thy abominations!

wash

Isaiah 1:16-19 Wash you, make you clean; put away the evil of your doings from before my eyes; cease to do evil...

Isaiah 55:7 Let the wicked forsake his way, and the unrighteous man his thoughts: and let him return to the LORD, and he will have mercy on him...

Ezekiel 18:31 Cast away from you all your transgressions, whereby you have transgressed; and make you a new heart and a new spirit...

Matthew 12:33 Either make the tree good, and his fruit good; or else make the tree corrupt, and his fruit corrupt...

Matthew 15:19,20 For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies...

Matthew 23:26,27 You blind Pharisee, cleanse first that which is within the cup and platter, that the outside of them may be clean also...

Luke 11:39 And the Lord said to him, Now do you Pharisees make clean the outside of the cup and the platter...

James 4:8 Draw near to God, and he will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double minded.

how long

Jeremiah 13:27 I have seen your adulteries, and your neighings, the lewdness of your prostitution, and your abominations on the hills in the fields...

Psalm 66:18 If I regard iniquity in my heart, the Lord will not hear me:

Psalm 119:113 I hate vain thoughts: but your law do I love.

Proverbs 1:22 How long, you simple ones, will you love simplicity? and the scorners delight in their scorning, and fools hate knowledge?

Acts 8:22 Repent therefore of this your wickedness, and pray God, if perhaps the thought of your heart may be forgiven you.

Romans 1:21 Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations...

1 Corinthians 3:20 And again, The Lord knows the thoughts of the wise, that they are vain.

How to Make Use of Christ for Cleansing of us from Our Daily Spots.
Having spoken of the way of making use of Christ for removing the guilt of our daily transgressions, we come to speak of the way of making use of Christ, for taking away the guilt that cleaveth to the soul, through daily transgressions; "for every sin defileth the man," Matt. xv. 20; and the best are said to have their spots, and to need washing, which presupposeth filthiness and defilement, Eph. v. 27. John xiii. 8-10. Hence we are so oft called to this duty of washing and making us clean. Isa. …
John Brown (of Wamphray)—Christ The Way, The Truth, and The Life

The Unseen Watcher
[This chapter is based on Daniel 5.] Toward the close of Daniel's life great changes were taking place in the land to which, over threescore years before, he and his Hebrew companions had been carried captive. Nebuchadnezzar, "the terrible of the nations" (Ezekiel 28:7), had died, and Babylon, "the praise of the whole earth" (Jeremiah 51:41), had passed under the unwise rule of his successors, and gradual but sure dissolution was resulting. Through the folly and weakness of Belshazzar, the grandson …
Ellen Gould White—The Story of Prophets and Kings

Repentance
Then has God also to the Gentiles granted repentance unto life.' Acts 11: 18. Repentance seems to be a bitter pill to take, but it is to purge out the bad humour of sin. By some Antinomian spirits it is cried down as a legal doctrine; but Christ himself preached it. From that time Jesus began to preach, and to say, Repent,' &c. Matt 4: 17. In his last farewell, when he was ascending to heaven, he commanded that Repentance should be preached in his name.' Luke 24: 47. Repentance is a pure gospel grace. …
Thomas Watson—The Ten Commandments