14.9 . Hath not the history of those before you reached you : the folk of Noah . and ( the tribes of ) Aad and Thamud , and those after them? None save Allah knoweth them . Their messengers came unto them with clear proofs , but they thrust their hands into their mouths , and said : Lo! we disbelieve in that wherewith ye have been sent , and lo! we are in grave doubt concerning that to which ye call us .