Exodus 10:10

10:10 He said to them, “The Lord will need to be with you if I release you and your dependents! Watch out! Trouble is right in front of you!

Exodus 7:9

7:9 “When Pharaoh says to you, ‘Do a miracle,’ and you say to Aaron, ‘Take your staff and throw it down before Pharaoh,’ it will become a snake.”