Psalms 35:13-14

35:13 When they were sick, I wore sackcloth,

and refrained from eating food.

(If I am lying, may my prayers go unanswered!)

35:14 I mourned for them as I would for a friend or my brother.

I bowed down in sorrow as if I were mourning for my mother.

Isaiah 20:2

20:2 At that time the Lord announced through Isaiah son of Amoz: “Go, remove the sackcloth from your waist and take your sandals off your feet.” He did as instructed and walked around in undergarments and barefoot.

Isaiah 22:12

22:12 At that time the sovereign master, the Lord who commands armies, called for weeping and mourning,

for shaved heads and sackcloth.

Joel 1:8

A Call to Lament

1:8 Wail like a young virgin clothed in sackcloth,

lamenting the death of her husband-to-be.

Joel 1:13

1:13 Get dressed and lament, you priests!

Wail, you who minister at the altar!

Come, spend the night in sackcloth, you servants of my God,

because no one brings grain offerings or drink offerings

to the temple of your God anymore.