The people of Thamud were successors to Aad. To them We sent their brother, Saleh. He said, "O My people! Serve Allah. You have no other god but He. The Clear Truth has come to you from your Lord. This is the she-camel of Allah, a token for your obedience. So let her feed in Allah's earth and do not harm her lest painful torment seize you." (Their feudal lords controlled land, crop, oases and water resources, and the weak were suffering. Saleh assigned a she-camel as a symbol of their reformation).