Abu Ayyub al-Ansari (died 674) — born Khalid bin Zayd bin Kulayb in Yathrib — hailed from the tribe of Banu Najjar and was a close companion (Arabic: الصحابه, sahaba) of  Muhammad. He was named after the biblical Job. Abu Ayyub was one among the Ansar (Arabic: الأنصار, meaning aiders, helpers or patrons) of early Muslim history or those who supported Muhammad after the hegira (migration) to Medina in 622. The patronym Abu Ayyub, means father (abu) of Ayyub. Abu Ayyub died of dysentery during the First Arab Siege of Constantinople.