Manna is an edible substance that, according to the Bible, God provided for the Israelites during their travels in the desert for 40 years. The name manna is said to derive from the question "man hu," which means "What is it?" in Aramaic. Manna is described as being "a fine, flake-like thing" like the frost on the ground. It arrived with the dew during the night. The Bible does not discuss the chemical composition of manna, but it is described as being like coriander seed, white, and tasting like wafers made with honey. Manna was a type of bread that God caused to miraculously appear each morning during the Israelites wilderness wanderings. The Israelites would go and collect a daily portion of manna each day, ensuring to get a double portion before the Sabbath. If they grabbed too much or too little, they suffered the consequences. Manna is a type, or foreshadowing, of Jesus. Just as God provided manna to the Israelites to save them from starvation, He has provided Jesus Christ for the salvation of our souls. The literal manna temporarily saved the Israelites from physical death, while the spiritual manna saves us from eternal death. Theories of mannas identity have ranged from a sweet exudation from a plant, caused by scale insects or aphids feeding on it, to a type of lichen not found in the Sinai Desert.