Simplify the following text for a Grade 6 native English-speaking person.
Original: He recalled the story of Moses descending from Mount Sinai with God 's Ten Commandments , including `` thou shalt not kill '' , and could not bring himself to kill the German .
Simplified: He remembered the Bible story about Moses coming down from Mount Sinai with God 's commandment , ` thou shalt not kill ' . He could not bring himself to kill the German .