8 “And if they do not believe you and they will not listen to the voice of the former sign, then they will believe the voice of the latter sign.
9 And if they also do not believe the second of these signs and they will not listen to your voice, then you must take water from the Nile and pour it onto the dry ground, and the water that you take from the Nile will become blood on the dry ground.”
10 And Moses said to Yahweh, “Please, Lord, I am not a man of words, neither recently nor in the past nor since your speaking to your servant, because I am heavy of mouth and of tongue.”
11 And Yahweh said to him, “Who gave a mouth to humankind, or who makes mute or deaf or sighted or blind? Is it not I, Yahweh?
12 So then go, and I myself will be with your mouth, and I will teach you what you must speak.”
13 And he said, “Please, Lord, do send anyone else whom you wish to send.”
14 And Yahweh was angry with Moses and said, “Is there not Aaron your brother the Levite? I know that he certainly can speak, and also there he is coming out to meet you, and when he sees you, he will rejoice in his heart.