And We shaded with clouds and sent down on you Al-Manna and the quail,... (up to) wronged themselves. (V.2:57)

Hadith Number 4478

setting

Narrated Sa`id bin Zaid

Allah's Messenger (ﷺ) said, "The Kam'a (i.e. a kind of edible fungus) is like the Manna (in that it is obtained without effort) and its water is a (medicine) cure for eye trouble."