Riyad as-Salihin
Riyad as-Salihin 1868
Ahadith about Dajjal and Portents of the Hour
Arabic hadith text
وعن سعيد بن زيد رضي الله عنه قال: سمعت رسول الله صلى الله عليه وسلم يقول: "الكمأة من المن، وماؤها شفاء للعين" ((متفق عليه)).
Translation
Sa'id bin Zaid (May Allah be pleased with him) reported
I heard the Messenger of Allah (ﷺ) saying, "Truffle (edible fungus) is a species of Al-Manna and their water cures eye diseases."[Al-Bukhari and Muslim]