According to the Bible, manna is an edible substance that God provided for the Israelites during their travels in the desert following the Exodus and prior to the conquest of Canaan. The Hebrew word translated as "manna" literally means "what is it?". The Bible describes manna as a bread-like substance that fell from heaven and tasted like honey. Numbers 11:7 states that mannas appearance was like "bdellium" or "resin". Theories of mannas identity have ranged from a type of lichen not found in the Sinai Desert to a sweet exudation from a plant caused by scale insects or aphids feeding on it. Possible plant sources include Anabasis setifera, Gomphocarpus sinaicus, Tamarix nilotica, Acacia raddiana, Capparis cartilaginea and C. spinosa v. aravensis, Pyrethrum santolinoides, and especially Haloxylon salicornicum, which grows commonly in the southern Sinai. The latter plant is called "man rimth" by Bedouins, who collect the sweet resin from the stems in summer.