442. Mannu, Salwa. 

In verses (2:57, 7:160, 20:80) of the Quran, it talks about the two varieties of food known as Mannu Salwa that were sent down by God to the children of Israel.

These two names of the two foods are not Arabic and neither are these foods familiar with Arabs. And many scholars have expressed their opinions, mostly imaginary.

The Almighty and his prophet have not explained about these foods. As far as we could find it is said by Prophet Muhammad there is a type of mushroom known as Mannu that is eaten by men.

Prophet Muhammad said an edible mushroom known as Kum-Ath belongs to Mannu category and water from it serves as a cure to eye diseases.

Book: Bukhari 4478, 4639, 5708 

It is sufficient enough for us to understand a food belonging to a type of mushroom and Salwa, another type was sent down by the Almighty to the children of Israel.