'Jug' in the Bible

The LORD forbid that I should raise my hand against the LORD's anointed. Now take the spear that is at his head and the jug of water, and let's go."

So David took the spear and the jug of water at Saul's head, and they left. No one saw, and no one knew, because no one was awake. They were all asleep, because a deep sleep from the LORD had fallen over them.

This thing that you did is not good. As the LORD lives, you deserve to die, you who didn't guard your lord, the LORD's anointed. Where is the king's spear and where is the jug of water that was at his head?"