Shemot 7:5-7

Orthodox Jewish Bible

⁵ And the Egyptians shall know that I am Hashem, when I stretch forth My yad upon Mitzrayim, bringing out Bnei Yisroel from among them.

⁶ And Moshe and Aharon did as Hashem commanded them, so did they.

⁷ And Moshe was fourscore years old, and Aharon fourscore three years, when they spoke unto Pharaoh.