Exodus 4:12-14 Amplified Bible (AMP)

¹² Now then go, and I, even I, will be with your mouth, and will teach you what you shall say.” ¹³ But he said, “Please my Lord, send the message [of rescue to Israel] by [someone else,] whomever else You will [choose].”

Aaron to Speak for Moses

¹⁴ Then the anger of the Lord was kindled and burned against Moses; He said, “Is there not your brother, Aaron the Levite? I know that he speaks fluently. Also, he is coming out to meet you, and when he sees you, he will be overjoyed.