 Al-Hakim al-Nishapuri

Abu Abd-Allah Muhammad ibn Abd-Allah al-Hakim al-Nishapuri () (933 - 1014), also known as "Ibn al-Bayyiʿ",) was a Persian Sunni scholar and the leading traditionist of his age, frequently referred to as the "Imam of the Muhaddithin" or the "Muhaddith of Khorasan.