it became
Exodus 4:17
And thou shalt take this rod in thine hand, wherewith thou shalt do signs.
Exodus 7:10-15
10
And Moses and Aaron went in unto Pharaoh, and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent.
11
Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments.
12
For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods.
13
And he hardened Pharaoh's heart, that he hearkened not unto them; as the LORD had said.
14
And the LORD said unto Moses, Pharaoh's heart is hardened, he refuseth to let the people go.
15
Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river's brink against he come; and the rod which was turned to a serpent shalt thou take in thine hand.
Amos 5:19
As if a man did flee from a lion, and a bear met him; or went into the house, and leaned his hand on the wall, and a serpent bit him.