'Haircloth' in the Bible

Make sounds of grief like a virgin dressed in haircloth for the husband of her early years.

Put haircloth round you and give yourselves to sorrow, you priests; give cries of grief, you servants of the altar: come in, and, clothed in haircloth, let the night go past, you servants of my God: for the meal offering and the drink offering have been kept back from the house of your God.