Humayd ibn Hurayth ibn Bahdal

[2] According to medieval historian Ibn Habib, Humayd succeeded Yazid ibn al-Hurr al-Ansi as Caliph Yazid I's ṣāḥib al-shurṭa (head of security forces),[3][4] a senior Umayyad governmental post;[5] the shurṭa served a dual role as the military division that guarded the caliph in battle and the police force of the capital city,[6] in this case Damascus.

[9] This was in retaliation to a raid by the end Amir against Musaiyakh in the Samawah (desert between Iraq and Syria), that killed twenty Kalbi tribesmen.

[4][3] When Abd al-Malik reached Damascus and clashed with Amr's forces, the latter dispatched Humayd as head of his cavalry and another Kalbi, Zuhayr ibn al-Abrad al-Kalbi.

In 689, Abd al-Malik dispatched Humayd, along with Kurayb ibn Abraha Abu Rishdin, to Constantinople to negotiate a treaty with the Byzantine emperor Justinian II.

[3] By 691, Abd al-Malik conquered Zubayrid-held Iraq and made peace with Zufar, while Umayr had been slain by the Taghlib, an allied tribe of the Banu Kalb.

[12] The latter were based in Medina's eastern countryside and had not taken part in the Qaysi–Kalbi war, but by dint of their tribal affiliation and possible assistance to the Amir and Sulaym, they became an alternative target for Humayd.

[12] With a massive Kalbi coalition consisting of the Ulaym and Abd Wadd clans, Humayd led assaults that killed and wounded numerous Fazari tribesmen, particularly at a place called Ah.