A man from Banu Mudlij asked the Messenger of Allah, peace and blessings be upon him: "O Messenger of Allah! We board our boats and go out to sea in search of game. We take only a little water with us for drinking. If any of us uses his water for ablution, he will remain thirsty. And if he performs ablution with sea water, he feels uneasy in his heart." The Prophet, peace and blessings be upon him, said: "The water of the sea is purifying and its dead (animals) are lawful."