Original sentence: He also ordered Moses to teach the ritual of Pesah sacrificing a lamb for God, and eating Matzot ("Poor-man's Bread" לחם עוני).Moses and Aaron each took two handfuls of soot from a furnace and Moses scattered it toward the sky in the presence of Pharaoh, at which time festering Shkhin erupted on Egyptian man and beast.The Shkhin was a kind of skin disease, usually translated as boils.The fifth plague of Egypt was a pestilence which exterminated the Egyptian livestock; that is, horses, donkeys, camels, cattle, sheep and goats.This came about when Aaron was commanded to hold a handful of his own dust and a handful of Moses' dust, fling it into the air, and it became fleas
Edited sentence: He also ordered Moses to teach the ritual of Pesah sacrificing a lamb for God, and eating Matzot ("Poor's Bread" לחם עוני).It says specifically Aaron, because Moses was not allowed to.Its main purpose was to give Pharaoh a taste of God's might and strength, and to demonstrate Moses's confidence in God.Moses and Aaron each took two handfuls of soot from a furnace and Moses scattered it toward the sky in the presence of Pharaoh, at which time festering boils erupted on Egyptian man and beast.See the Plague of Blood for the term Ha'karas Ha'Tov).The Shkhin was a kind of skin disease, known as boils.The fifth plague of Egypt was a disease (Pestilence) which exterminated the Egyptian livestock; that is, horses, donkeys, camels, cattle, sheep and goats.This came about when Aaron was commanded to hold a handful of his own dust and a handful of Moses' dust, fling it into the air, and it became fleas (Moses could not initiate this plague, since the dust of the earth helped him when he killed an Egyptian guard who was beating a fellow Jew to death.This is because the Nile saved him when he was a baby and he had to appreciate what it did.This is called Ha-koras ha-tov