Al-Wathiq

al-Wathiq الواثق
Amir al-Mu'minin Khalifat Allah
Gold dinar of al-Wathiq, minted in Baghdad in 843
9th Caliph of the Abbasid Caliphate
Reign	5 January 842 – 10 August 847
Predecessor	al-Mu'tasim
Successor	al-Mutawakkil
Born	17 April 812 Near Mecca, Abbasid Caliphate
Died	10 August 847 (aged 35) Samarra, Abbasid Caliphate
Burial	Samarra
Consorts	Qurb Farida Qalam
Issue	Muhammad al-Muhtadi
Dynasty	Abbasid
Father	al-Mu'tasim
Mother	Qaratis
Religion	Islam (Mu'tazilism)

Abu Ja'far Harun ibn Muhammad (Arabic: أبو جعفر هارون بن محمد, romanized: Abū Jaʿfar Hārūn ibn Muḥammad; 17 April 812 – 10 August 847), commonly known by his regnal name al-Wathiq bi'Ilah (Arabic: الواثق بالله, romanized: al-Wāthiq biʾllāh, lit. 'He who trusts in God'), was an Abbasid caliph who reigned from 842 until his death in 847.

Al-Wathiq is described in the sources as well-educated, intellectually curious, but also a poet and a drinker, who enjoyed the company of poets and musicians as well as scholars. His brief reign was one of continuity with the policies of his father, al-Mu'tasim (r. 833–842), as power continued to rest in the hands of the same officials whom al-Mu'tasim had appointed. The chief events of the reign were the suppression of revolts: Bedouin rebellions occurred in Syria in 842, the Hejaz in 845, and the Yamama in 846, Armenia had to be pacified over several years, and above all, an abortive uprising took place in Baghdad itself in 846, under Ahmad ibn Nasr al-Khuza'i. The latter was linked to al-Wathiq's continued support for the doctrine of Mu'tazilism, and his reactivation of the mihna to root out opponents. In foreign affairs, the perennial conflict with the Byzantine Empire continued, and the Abbasids even scored a significant victory at Mauropotamos, but after a prisoner exchange in 845, warfare ceased for several years.

Al-Wathiq's character is relatively obscure compared to other early Abbasid caliphs. He appears to have been a sedentary ruler occupied with the luxuries of the court, a capable poet, and a patron of poets and musicians, as well as showing interest in scholarly pursuits. Al-Wathiq's unexpected death left the succession unsettled. Al-Wathiq's son al-Muhtadi was passed over due to his youth, and his half-brother al-Mutawakkil (r. 847–861) was chosen as the next caliph by a coterie of leading officials.