Ibn Bayhas al-Kilabi
| Ibn Bayhas al-Kilabi  أبن بيهس | |
|---|---|
| Governor of Syria and Damascus | |
| In office 813–823/25 | |
| Monarch | al-Ma'mun | 
| Preceded by | Sulayman ibn Abd Allah | 
| Succeeded by | 
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| Personal details | |
| Born | Sham, Abbasid Caliphate | 
| Died | 820s al-Iraq, Abbasid Caliphate | 
| Relations | 
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| Parent | 
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| Full name | Muhammad ibn Salih ibn Bayhas al-Kilabi | 
| Military career | |
| Allegiance | Abbasid Caliphate | 
| Branch | Abbasid army | 
| Years of service | 826 (end of active service) | 
| Rank | General | 
| Unit | Abbasid Syrian regiment, Kilabi tribesmen of Ibn Bayhas | 
| Battles / wars | Suppression of pro-Umayyad revolts of 820s | 
Muhammad ibn Salih ibn Bayhas al-Kilabi, better known as Ibn Bayhas (Arabic: أبن بيهس), was the Abbasid governor of Damascus in September 813–824/825 and a prominent chief of the Qays tribes in the environs of Damascus against their Yamani rivals. Under his leadership, a succession of Umayyad claimants to the caliphate, Abu al-Umaytir al-Sufyani, Maslama ibn Ya'qub al-Marwani and Sa'id ibn Khalid al-Uthmani, were defeated, marking an end to serious challenges of Abbasid authority in Syria by remnants of the Umayyad dynasty, which had been toppled by the Abbasids in 750. Although a loyalist of Caliph al-Ma'mun, he was viewed as a rival by al-Ma'mun's viceroy of Syria, Abd Allah ibn Tahir ibn al-Husayn, who deposed him around 824/825. Two years later, he was brought to Iraq, where he eventually died.