Exodus 2:12

The slaying of the Egyptian is not to be justified, or attributed to a divine inspiration, but it is to be judged with reference to the provocation, the impetuosity of Moses’ natural character, perhaps also to the habits developed by his training at the court of Pharaoh. The act involved a complete severance from the Egyptians, but, far from expediting, it delayed for many years the deliverance of the Israelites. Forty years of a very different training prepared Moses for the execution of that appointed work.