Saf ibn Sayyad (Arabic: الصف بن الصياد), later known as Abdullah ibn Sa'id (Arabic: عبد الله بن سعيد), was an alleged claimant of prophethood during the time of Islamic prophet Muhammad and his companions who later disappeared after the Ridda wars.
Ibn `Umar said: "You have not told me the truth; by Allah some of you informed me that he would not die until he would have the largest number of offspring and huge wealth and it is he about whom it is thought so.
"[2] However, Abu Sa`id al-Khudri reported: "Ibn Sayyad said to me something for which I felt ashamed.
[3] Due to these constant claims against him, Ibn Sa'id became depressed, stating: "I think I should take a rope and tie it to the tree and commit suicide because of the talks of the people."
(Sahih Muslim 54:114) Saf ibn Sayyad was last seen during the Battle of al-Harra, where the Umayyad Caliph Yazid I had sent a force to subjugate the city of Medina.