they fast.

Jeremiah 11:11
Therefore this is what the LORD says: I am about to bring upon them a disaster that they cannot escape. They will cry out to Me, but I will not listen to them.

Proverbs 1:28
Then they will call on me, but I will not answer; they will earnestly seek me, but will not find me.

Proverbs 28:9
Whoever turns his ear away from hearing the law, even his prayer is detestable.

Isaiah 1:15
When you spread out your hands in prayer, I will hide My eyes from you; even though you multiply your prayers, I will not listen. Your hands are covered with blood.

Isaiah 58:3
"Why have we fasted, and You have not seen? Why have we humbled ourselves, and You have not noticed?" "Behold, on the day of your fast, you do as you please, and you oppress all your workers.

Ezekiel 8:18
Therefore I will respond with wrath. I will not look on them with pity or spare them. Although they shout loudly in My ears, I will not listen to them."

Micah 3:4
Then they will cry out to the LORD, but He will not answer them. At that time He will hide His face from them because of the evil they have done.

Zechariah 7:13
Therefore just as I had called and they would not listen, so when they called I would not listen, says the LORD of Hosts.

and when.

Jeremiah 6:20
What use to Me is frankincense from Sheba or sweet cane from a distant land? Your burnt offerings are not acceptable; your sacrifices do not please Me."

Jeremiah 7:21, 22
This is what the LORD of Hosts, the God of Israel, says: 'Add your burnt offerings to your other sacrifices and eat the meat yourselves! . . .

Proverbs 15:8
The sacrifice of the wicked is detestable to the LORD, but the prayer of the upright is His delight.

Proverbs 21:27
The sacrifice of the wicked is detestable--how much more so when brought with ill intent!

Isaiah 1:11-15
"What is your multitude of sacrifices to Me?" says the LORD. "I am full from the burnt offerings of rams and the fat of well-fed cattle; I take no delight in the blood of bulls, of lambs and goats. . . .

but.

Jeremiah 9:16
I will scatter them among the nations that neither they nor their fathers have known, and I will send a sword after them until I have finished them off."

Jeremiah 15:2, 3
If they ask you, 'Where shall we go?' you are to tell them that this is what the LORD says: 'Those destined for death, to death; those destined for the sword, to the sword; those destined for famine, to famine; those destined for captivity, to captivity.' . . .

Jeremiah 16:4
"They will die from deadly diseases. They will not be mourned or buried, but will lie like dung on the ground. They will be finished off by sword and famine, and their corpses will become food for the birds of the sky and the beasts of the earth."

Jeremiah 21:7-9
After that, declares the LORD, I will hand over King Zedekiah of Judah, his officers, and the people in this city who survive the plague and sword and famine, to King Nebuchadnezzar of Babylon and to their enemies who seek their lives. He will put them to the sword; he will not spare them or show pity or compassion.' . . .

Jeremiah 24:10
And I will send the sword, famine, and plague against them, until they have perished from the land I gave to them and their fathers.'"

Jeremiah 29:17, 18
This is what the LORD of Hosts says: "I will send against them sword, famine, and plague, and I will make them like rotten figs, so bad that they cannot be eaten. . . .

Ezekiel 5:12-17
A third of your people will die by plague or be consumed by famine within you, a third will fall by the sword outside your walls, and a third I will scatter to every wind and unleash a sword behind them. . . .

Ezekiel 14:21
For this is what the Lord GOD says: 'How much worse will it be when I send against Jerusalem My four dire judgments--sword, famine, wild beasts, and plague--in order to cut off from it both man and beast?