'Untie' in the Bible

John replied to all of them, "I'm baptizing you with water, but one is coming who is more powerful than I, and I'm not worthy to untie his sandal straps. It is he who will baptize you with the Holy Spirit and fire.

The Lord replied to him, "You hypocrites! Doesn't each of you on the Sabbath untie his ox or donkey and lead it out of its stall to give it some water?

"Go into the village ahead of you," he said. "As you enter, you will find a colt tied up that no one has ever ridden. Untie it and bring it along.