He also received transmission from the judge al-Mahamili (1) and from Yusuf ibn al-Buhlul al-Azraq, and he attended the teaching sessions of Abu Bakr ibn al-Anbari.
Among those who recited the Qur’an to him were Abu Bakr ibn Musa al-Khayyat, Abu ʿAli Ghulam al-Harras (2), Nasr ibn ʿAbd al-ʿAziz al-Farisi, and a group of others.
Those who narrated from him include Abu Muhammad al-Khallal, Ahmad ibn ʿAli ibn Abi ʿUthman, ʿAli ibn al-Busri, ʿAli ibn Muhammad ibn Muhammad al-Anbari the preacher, and many more.
Al-Khatib (3) said: “He was trustworthy, pious, and devout.”
Al-ʿAtiqi declared: “I have never seen anyone his equal in his field.” (4)
Al-Azhari said: “ʿUbayd Allah was an imam among the imams.” (5)
ʿIsa ibn Ahmad al-Hamadhani recounted: “Whenever Abu Ahmad visited Abu Hamid al-Isfaraini, the latter would rise, walk barefoot to the door of his mosque, and go out to welcome him.” (6)
Mansur the jurist said: “I have not seen among the shaykhs anyone who teaches purely for the sake of Allah except Abu Ahmad.”