Sh’mot (Exodus) 6:29—7:7
29HaShem spoke to Moshe, saying, “I am HaShem. Speak to Pharaoh, king of Mitzrayim, everything that I speak to you.” 30Moshe said before HaShem, “Behold! I have sealed up lips, so how shall Pharaoh heed me?”
1HaShem said to Moshe, “See I have made you a master over Pharaoh, and Aharon your brother shall be your spokesman. 2You shall speak everything that I shall command you, and Aharon your brother shall speak to Pharaoh, that he should send the Children of Yisra’el form his land. 3But I shall harden Pharaoh’s heart and I shall multiply My signs and My wonders in the land of Mitzrayim. 4Pharaoh will not heed you, and I shall put My hand upon Mitzrayim; and I shall take out My legions—My people the Children of Yisra’el—from the land of Mitzrayim, with great judgments. 5And Mitzrayim shall know that I am HaShem, when I stretch out My hand over Mitzrayim; and I shall take the Children of Yisra’el out from among them.”
6Moshe and Aharon did as HaShem commanded them; so they did. 7Moshe was eighty years old and Aharon was eighty-three years old when they spoke to Pharaoh.