Al-Khallal's exact date of birth is not known. He died in 923, which means that he would have been born during Ahmad ibn Hanbal's twilight years. The Oxford International Encyclopaedia of Legal History estimates al-Khallal's year of birth as 848. According to Muslim historian
al-Dhahabi, there was no such thing as an independent Hanbalite school of law prior to al-Khallal's efforts at compiling Ibn Hanbal's views. ==Reception==