Say unto Aaron # 02_EXO_07_19 # And the LORD spake unto Moses, Say unto Aaron, Take thy rod, and stretch out thine hand upon the waters of Egypt, upon their streams, upon their rivers, and upon their ponds, and upon all their pools of water, that they may become blood; and [that] there may be blood throughout all the land of Egypt, both in [vessels of] wood, and in [vessels of] stone. 
Say unto Aaron # 02_EXO_08_05 # And the LORD spake unto Moses, Say unto Aaron, Stretch forth thine hand with thy rod over the streams, over the rivers, and over the ponds, and cause frogs to come up upon the land of Egypt. 
Say unto Aaron # 02_EXO_08_16 # And the LORD said unto Moses, Say unto Aaron, Stretch out thy rod, and smite the dust of the land, that it may become lice throughout all the land of Egypt. 
say unto Aaron # 02_EXO_07_09 # When Pharaoh shall speak unto you, saying, Show a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast [it] before Pharaoh, [and] it shall become a serpent.