Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) narrates from the Messenger of Allah (peace and blessings be upon him) that he (peace be upon him) said: "Whoever has a well dug from which living beings—jinn, humans, and birds—drink, Allah Almighty will grant him reward on the Day of Resurrection. And whoever builds a mosque the size of a sparrow's nest or even smaller, Allah Almighty will build a house for him in Paradise." The words of Yunus are: "Whatever beast or bird drinks from it—" and he said: "A mosque the size of a sparrow's nest."