Exodus 7:7 - Clarke's commentary and critical notes on the Bible

And Moses was fourscore years old, and Aaron fourscore and three years old, when they spake unto Pharaoh. Moses was fourscore years old - He was forty years old when he went to Midian, and he had tarried forty years in Midian; (see Exodus 2:11, and Acts 7:30); and from this verse it appears that Aaron was three years older than Moses. We have already seen that Miriam their sister was older than either, Exodus 2:4.