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Overview
Muhammad al-Qahir billah, an Abbasid caliph who was given the allegiance in 320 AH after al-Muqtadir was killed, and was titled al-Qahir billah. 1 Al-Suyuti says that he was Muhammad ibn al-Mu'tadid. The sources differ on the details of his caliphate and his deposition, and this page sets out what each says in its attribution. 4
The allegiance
Al-Suyuti relates that Mu'nis and the amirs gave him the allegiance when they deposed al-Muqtadir on a night in Muharram, and named him al-Qahir billah. Then the army came seeking al-Muqtadir to restore him, and al-Qahir was brought out weeping. Al-Muqtadir kissed him and told him he was without fault. When al-Muqtadir was killed, the caliphate was offered to Ibn al-Muktafi, who refused, so al-Qahir was given the allegiance. 4 5
His caliphate
- Al-Suyuti says he confiscated the property of the family of al-Muqtadir and tortured them, and that the mother of al-Muqtadir died under torture. Ibn al-Jawzi says that he tortured her with various kinds of torture. 5 11
- Ibn al-Athir says that in 321 AH he seized Mu'nis, Biliq and his son Ali by a trick, and slaughtered them in Sha'ban. He sought Ahmad ibn al-Muktafi, and built a wall over him while he was still alive. 10
- Al-Suyuti describes him as foolish, bloodthirsty, of bad conduct and addicted to wine. Al-Mas'udi says that he made a great spear with which he struck anyone he wanted to kill. 5 7
His deposition and death
Ibn al-Athir says he was deposed in 322 AH, and that the Sajiyya and the Hajariyya found him asleep. It is said the cause was that he had been slighting them in their allowances. 9
Al-Mas'udi relates the story of the money he hid: he denied it and was tortured, then al-Radi took it, and he said the money was buried in the garden. The garden was dug up and nothing was found. 8 Al-Suyuti says he died in Jumada al-Ula 339 AH at the age of fifty-three, and Ibn al-Jawzi also gives 339 AH. 5 12
Notes for researchers
- The data say the allegiance was in 320 AH according to al-Tabari and in 317 AH according to al-Suyuti; this contradiction needs an additional source.
- Ibn al-Jawzi gives his kunya as Abu Mansur and his mother as a freedwoman called Qabul. 11
Connections
People and things also explored
al-Muqtadir bi'llah· al-Radi bi-llah Abu al-Abbas Muhammad ibn al-Muqtadir· مؤنس الخادم الملقب بالمظفر· سيما مقدم الحجرية· Mu'nis's deposition of al-Muqtadir and the troops' restoration of him· The deposition of al-Qahir and the blinding of his eyes· Al-Qahir's ban on singing-girls and wine
Sources
- Tarikh al-Rusul wa'l-Muluk — al-Tabari (ed. Abu al-Fadl Ibrahim) , j.11 p.152
- Tarikh al-Rusul wa'l-Muluk — al-Tabari (ed. Abu al-Fadl Ibrahim) , j.11 p.154
- Tarikh al-Rusul wa'l-Muluk — al-Tabari (ed. Abu al-Fadl Ibrahim) , j.11 p.161
- Tarikh al-Khulafa — al-Suyuti (Dar al-Minhaj edition) , p. 591-592
- Tarikh al-Khulafa — al-Suyuti (Dar al-Minhaj edition) , p. 597-602
- Tarikh al-Khulafa — al-Suyuti (Dar al-Minhaj edition) , p. 612
- Muruj al-Dhahab — al-Masʼudi , p. 667-670
- Muruj al-Dhahab — al-Masʼudi , p. 687-688
- al-Kamil fi'l-Tarikh of Ibn al-Athir , p. 209-210
- al-Kamil fi'l-Tarikh of Ibn al-Athir , p. 191-195
- al-Muntazam fi Tarikh al-Muluk wa'l-Umam — Ibn al-Jawzi , p. 517, 545
- al-Muntazam fi Tarikh al-Muluk wa'l-Umam — Ibn al-Jawzi , p. 660
Cite this page
islam.museum contributors. “Muhammad al-Qahir bi-llah”. islam.museum, https://islam.museum/en/person/al-qahir-billah/. CC BY-SA 4.0. Last updated 2026-10-23.