Bible Verses About Sackcloth: The Jews lay in, when in deep affliction

Rizpah the daughter of Aiah took sackcloth, and spread it for her on the rock, from the beginning of harvest until water was poured on them from the sky. She allowed neither the birds of the sky to rest on them by day, nor the animals of the field by night.

When Ahab heard those words, he tore his clothes, and put sackcloth on his flesh, and fasted, and lay in sackcloth, and went softly.

Put on sackcloth and mourn, you priests! Wail, you ministers of the altar. Come, lie all night in sackcloth, you ministers of my God, for the meal offering and the drink offering are withheld from your God’s house.