Ruth 4:7-8

4:7 (Now this used to be the customary way to finalize a transaction involving redemption in Israel: A man would remove his sandal and give it to the other party. This was a legally binding act in Israel.) 4:8 So the guardian said to Boaz, “You may acquire it,” and he removed his sandal.

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.

Mark 1:7

1:7 He proclaimed, “One more powerful than I am is coming after me; I am not worthy to bend down and untie the strap of his sandals.

John 1:27

1:27 who is coming after me. I am not worthy to untie the strap of his sandal!”