Exodus 1:10

1:10 Come, let’s deal wisely with them. Otherwise they will continue to multiply, and if a war breaks out, they will ally themselves with our enemies and fight against us and leave the country.”

Exodus 17:9

17:9 So Moses said to Joshua, “Choose some of our men and go out, fight against Amalek. Tomorrow I will stand on top of the hill with the staff of God in my hand.”