The ruling on performing wudu' or drinking from water in which a dog has drunk?

Question:
He says: Honorable Shaykh, may Allah grant you success, if a dog drinks or licks in water, is it permissible to drink from it or perform wudu' if nothing else is available?

Answer:
No, no, the Messenger (peace and blessings be upon him) ordered it to be poured out; he said, "Let it be poured out." But if one is in dire necessity and fears death if he does not drink it, he drinks it. Even carrion is eaten if one is in dire necessity for it. This falls under the category of dire necessity. As for the category of choice, it is poured out; the spilled liquid is poured out, the water is poured out, and other liquids are poured out and not used. Allah knows best, and may Allah send prayers and peace upon our Prophet Muhammad and upon his family and his Companions.