Rayta was the daughter of al-Saffah from his famous wife Umm Salama, who belonged to Makhzum clan of the Quraysh.
Sa'id became an oral transmitter of historical tradition in the early Abbasid period.
[3][4] In 761, the Abbasid caliph al-Mahdi married Rayta as his first wife after his return from Khurasan.
[5][6] Rayta remained the most influential wife of al-Mahdi until his marriage to al-Khayzuran bint Atta, an Arab woman of Yemenite origin born in the Hejaz.
Rayta was related to the Abbasid dynasty, the ruling house of the Caliphate both maternally and paternally.