2Sa 15:30 But David went up the ascent of the Mount of Olives, weeping as he went, barefoot and with his head covered. And all the people who were with him covered their heads, and they went up, weeping as they went.
Isa 20:2 at that time the Lord spoke by Isaiah the son of Amoz, saying, “Go, and loose the sackcloth from your waist and take off your sandals from your feet,” and he did so, walking naked and barefoot.

Isa 20:3 Then the Lord said, “As my servant Isaiah has walked naked and barefoot for three years as a sign and a portent against Egypt and Cush,
Isa 20:4 so shall the king of Assyria lead away the Egyptian captives and the Cushite exiles, both the young and the old, naked and barefoot, with buttocks uncovered, the nakedness of Egypt.
Jer 2:25 Keep your feet from going unshod
and your throat from thirst.
But you said, ‘It is hopeless,
for I have loved foreigners,
and after them I will go.’
Copyright information for ESV