Hebrew likely from the Aramaic “man hu,” meaning “What is it?” Manna is the term used for an edible substance God provided for the Israelites as they traveled in the desert. Manna is described as being like the frost left on the ground. It was flat, the size of coriander, white, and tasted bland yet sweet.
Manna kept overnight would rot, stink, and have worms in it by the morning, with the exception of manna gathered for the Sabbath. In the Quran manna is also mentioned. Sahih Muslims claim that Muhammad said they were like a “truffle” given by God (here Allah) for food, and that its juices could be used an eye medicine (Bukhari Volume 7, Book 71, Number 609). Some scholars have proposed manna may have been a type of honeydew or some form of lichen, a composite organism that arises from algae.
See 3 Moses 22:15-21, Exodus 16:1–36, Numbers 11:1–9.