Ibn Abi Sadiq al-Naishaburi, Abu al-Qasim ‘Abd al-Rahman ibn ‘Ali (Arabic and Persian: أبوالقاسم عبد الرحمن بن علي بن أبي صادق النيشابوري ) was an 11th-century Persian physician from Nishapur in Khorasan.He was a pupil of Avicenna. As he composed a popular commentary on the Aphorisms of Hippocrates, he was known in some circles as "the second Hippocrates" (Buqrat al-thani).