صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب ذكر الماء الذي لا ينجس، والذي ينجس إذا خالطته نجاسةChapters on Water that is Pure and Impure
(86) بَابُ الرُّخْصَةِ فِي الْغُسْلِ وَالْوُضُوءِ مِنْ مَاءِ الْبَحْرِ، إِذْ مَاؤُهُ طَهُورٌ مَيْتَتُهُ حِلٌّ،Chapter 86: Permission to wash and perform ablution with seawater, as its water is pure and its dead are lawful
Hadith Q111
ضِدُّ قَوْلِ مَنْ كَرِهَ الْوُضُوءَ، وَالْغُسْلَ مِنْ مَاءِ الْبَحْرِ، وَزَعَمَ أَنَّ تَحْتَ الْبَحْرِ نَارًا، وَتَحْتَ النَّارِ بَحْرًا حَتَّى عَدَّ سَبْعَةَ أَبْحُرٍ، وَسَبْعَ نِيرَانٍ، وَكُرْهُ الْوُضُوءِ وَالْغُسْلِ مِنْ مَائِهِ لِهَذِهِ الْعِلَّةِ زَعْمٌ
Contrary to the statement of the person who considers performing ablution and bathing with sea water to be disliked, his claim is that there is fire beneath the sea, and beneath the fire is the sea, in this way there are seven seas and seven fires. Due to this alleged reason, he considers performing ablution and bathing with sea water to be disliked.
