Mishkat al-Masabih
Mishkat al-Masabih 479
وَعَنْ أَبِي هُرَيْرَةَ قَالَ: سَأَلَ رَجُلٌ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّا نَرْكَبُ الْبَحْرَ وَنَحْمِلُ مَعَنَا الْقَلِيلَ مِنَ الْمَاءِ فَإِنْ تَوَضَّأْنَا بِهِ عَطِشْنَا أفنتوضأ من مَاء الْبَحْرِ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «هُوَ الطَّهُورُ مَاؤُهُ الْحِلُّ مَيْتَتُهُ» . رَوَاهُ مَالك وَالتِّرْمِذِيّ وَالنَّسَائِيّ وَابْن مَاجَه والدارمي
Abū Hurayra said that a man asked the Messenger of Allah: ‘We travel by sea and carry only a little water with us. If we use it for ablution, we will be thirsty. May we perform ablution with seawater?’ The Messenger of Allah replied: ‘Its water is purifying, and its dead creatures are lawful.’ Mālik, al-Tirmidhī, al-Nasāʾī, Ibn Mājah, and al-Dārimī transmitted it.