Exodus 4:6-10

The Lord furthermore said to him, “Now put your hand inside the fold of your robe.” So he put his hand inside the fold, and when he took it out, behold, his hand was leprous like snow.

Then He said, “Put your hand inside the fold of your robe again.” So he put his hand into the fold again, and when he took it out of the fold, behold, it was restored like the rest of his flesh.

“So if they will not believe you nor pay attention to the evidence of the first sign, they may believe the evidence of the last sign.

But if they will not believe even these two signs nor pay attention to what you say, then you shall take some water from the Nile and pour it on the dry ground; and the water which you take from the Nile will turn into blood on the dry ground.”

Then Moses said to the Lord, “Please, Lord, I have never been eloquent, neither recently nor in time past, nor since You have spoken to Your servant; for I am slow of speech and slow of tongue.”