Abu Hurairah said: “A man asked the Prophet صلی اللہ علیہ وآلہ وسلم ‘Messenger of Allah صلی اللہ علیہ وآلہ وسلم, we travel by sea and we take a little water with us, but if we use it for Wudu’, we will go thirsty. Can we perform Wudu with seawater?’ The Messenger of Allah صلی اللہ علیہ وآلہ وسلم said: ‘Its water is a means of purification and its dead meat is permissible.” (Sahih)