H 373 - Saad says: When Muhammad Ibn Nasir was inflicted by the malady in which he died, he was asked, “To whom does this order belong?” He said as his tongue was heavy, weak, and stuttering, “Ahmad.” It was not known who this Ahmad was. His followers divided into three groups after him. One group said that it was his son, Ahmad. Another maintained it was Ahmad Ibn Muhammad Ibn Musa Ibn Furat. Another group believed that it was Ahmad Ibn Abi Husain Ibn Bushr Ibn Yazid. Their group disintegrated.