It is clear: God does not take no
for an answer. He sends Moses, with his staff (called the staff of God
in Exodus 4:20). Moses can perform wonders with it and show the power of God against Pharaoh, who is seen as a god. Moses will represent God for Israel and the Pharaoh. The staff is no magic instrument but shows God’s authority and points to Moses as a true prophet.
17 And take in your hand this staff, with which you shall do the signs.”