Sunan Abi Dawud 83
سنن أبي داود#83SahihNarrated AbuHurayrah: A man asked the Messenger of Allah (ﷺ): Messenger of Allah, we travel on the sea and take a small quantity of water with us. If we use this for ablution, we would suffer from thirst. Can we perform ablution with sea water? The Messenger (ﷺ) replied: Its water is pure and what dies in it is lawful food
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 1:83