Exodus 2:11-12

11Many years later, Moses grew to become a man. At that time, he went out to visit his own people, the Israelites. He saw that they had to do very hard work without any rest. He saw an Egyptian man. He was attacking an Israelite man. The Egyptian was hitting someone from Moses' own country!

12Moses looked in every direction. He saw that nobody was near. So Moses killed the Egyptian. He buried his body in the sand to hide it.