Exodus 3:5

3:5 God said, “Do not approach any closer! Take your sandals off your feet, for the place where you are standing is holy ground.”

Joshua 5:15

5:15 The commander of the Lord’s army answered Joshua, “Remove your sandals from your feet, because the place where you stand is holy.” Joshua did so.

Ezekiel 24:17

24:17 Groan in silence for the dead, but do not perform mourning rites. Bind on your turban and put your sandals on your feet. Do not cover your lip and do not eat food brought by others.”

Ezekiel 24:23

24:23 Your turbans will be on your heads and your sandals on your feet; you will not mourn or weep, but you will rot for your iniquities and groan among yourselves.