Exodus 4:20
"And Moses took his wife and his sons, and set them upon an ass, and he returned to the land of Egypt: and Moses took the rod of God in his hand."
Cross References (ranked by relevance)
Exodus 17:9
And Moses said unto Joshua, Choose us out men, and go out, fight with Amalek: to morrow I will stand on the top of the hill with the rod of God in mine hand.
Numbers 20:11
And Moses lifted up his hand, and with his rod he smote the rock twice: and the water came out abundantly, and the congregation drank, and their beasts also.
Exodus 4:2
And the LORD said unto him, What is that in thine hand? And he said, A rod.
Exodus 4:17
And thou shalt take this rod in thine hand, wherewith thou shalt do signs.