²⁸ And Moses told Aaron all the words of the LORD who had sent him, and all the signs which he had commanded him.

¹⁵ And it came to pass, when Pharaoh would hardly let us go, that the LORD slew all the first-born in the land of Egypt, both the first-born of man, and the first-born of beasts: therefore I sacrifice to the LORD all that openeth the matrix, being males; but all the first-born of my children I redeem.