'Untie' in the Bible

And he was preaching, saying, "One [who is] more powerful than I is coming after me, of whom I am not worthy to bend down [and] untie the strap of his sandals.

and said to them, "Go into the village before you, and right away [as you] enter into it you will find a colt tied, on which no one [has] ever sat. Untie it and bring [it].