'Bread and Water' in the Bible

For it was so, when Jezebel cut off the prophets of the LORD, that Obadiah took an hundred prophets, and hid them by fifty in a cave, and fed them with bread and water.)

Was it not told my lord what I did when Jezebel slew the prophets of the LORD, how I hid an hundred men of the LORD'S prophets by fifty in a cave, and fed them with bread and water?

and say, ‘Thus says the king, “Put this man in prison, and feed him sparingly with the bread and water until I return safely.”’”