The Book of Drinks
36/28. Chapter:
The virtue of truffles, and treating the eyes with them
Sahih Muslim
حَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، عَنْ عَبْدِ الْمَلِكِ بْنِ عُمَيْرٍ، قَالَ سَمِعْتُ عَمْرَو، بْنَ حُرَيْثٍ يَقُولُ قَالَ سَمِعْتُ سَعِيدَ بْنَ زَيْدٍ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " الْكَمْأَةُ مِنَ الْمَنِّ الَّذِي أَنْزَلَ اللَّهُ عَزَّ وَجَلَّ عَلَى بَنِي إِسْرَائِيلَ وَمَاؤُهَا شِفَاءٌ لِلْعَيْنِ " .
Sa'id b. Zaid reported Allah's Messenger (ﷺ) as saying: Truffles are 'Manna' which Allah, the Exalted the Majestic, sent to the people of Israil, and its juice is a medicine for the eyes.
Reference : Sahih Muslim 2049fIn-book reference : Book 36, Hadith 221USC-MSA web (English) reference : Book 23, Hadith 5088