سورة Al-A'raf (The Heights ) - الآية 73

And to Thamood, their brother Saleh. He said, “O my people! Worship God; you have no god other than Him. Clarification has come to you from your Lord. This she-camel of God is a sign for you. So leave her to graze on God’s earth, and do her no harm, lest a painful penalty seizes you.”