Exodus 7:3-13

3 I will harden Par`oh's heart, and multiply my signs and my wonders in the land of Mitzrayim.
4 But Par`oh will not listen to you, and I will lay my hand on Mitzrayim, and bring forth my hosts, my people the children of Yisra'el, out of the land of Mitzrayim by great judgments.
5 The Mitzrim shall know that I am the LORD, when I stretch forth my hand on Mitzrayim, and bring out the children of Yisra'el from among them."
6 Moshe and Aharon did so. As the LORD commanded them, so they did.
7 Moshe was eighty years old, and Aharon eighty-three years old, when they spoke to Par`oh.
8 The LORD spoke to Moshe and to Aharon, saying,
9 "When Par`oh speaks to you, saying, 'Perform a miracle!' then you shall tell Aharon, 'Take your rod, and cast it down before Par`oh, that it become a serpent.'"
10 Moshe and Aharon went in to Par`oh, and they did so, as the LORD had commanded: and Aharon cast down his rod before Par`oh and before his servants, and it became a serpent.
11 Then Par`oh also called for the wise men and the sorcerers. They also, the magicians of Mitzrayim, did in like manner with their enchantments.
12 For they cast down every man his rod, and they became serpents: but Aharon's rod swallowed up their rods.
13 Par`oh's heart was hardened, and he didn't listen to them; as the LORD had spoken.
The Hebrew Names Version is in the public domain.