'Washing' in the Bible

Let me get water for washing your feet, and take your rest under the tree:

Then the man came into the house, and Laban took their cords off the camels and gave them dry grass and food, and he gave to him and the men who were with him water for washing their feet.

And the servant took them into Joseph's house, and gave them water for washing their feet; and he gave their asses food.

Then, after washing his face, he came out, and controlling his feelings said, Put food before us.

Knotting his ass's cord to the vine, and his young ass to the best vine; washing his robe in wine, and his clothing in the blood of grapes: