Exodus 4:8–14

8 If they will not believe thee, saith he, nor hear the voice of the former sign, they will believe the word of the latter sign.

9 But if they will not even believe these two signs, nor hear thy voice: take of the river water, and pour it out upon the dry land, and whatsoever thou drawest out of the river, shall be turned into blood.

10 Moses said: I beseech thee, Lord, I am not eloquent from yesterday and the day before; and since thou hast spoken to thy servant, I have more impediment and slowness of tongue.

11 The Lord said to him: Who made man’s mouth? or who made the dumb and the deaf, the seeing and the blind? did not I?

12 Go therefore, and I will be in thy mouth; and I will teach thee what thou shalt speak.

13 But he said: I beseech thee, Lord, send whom thou wilt send.

14 The Lord being angry at Moses, said: Aaron the Levite is thy brother, I know that he is eloquent: behold he cometh forth to meet thee, and seeing thee, shall be glad at heart.