Ibn Abi Sadiq al-Naishaburi, Abu al-Qasim ‘Abd al-Rahman ibn ‘Ali 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". Ismail Gorgani, the author of Zakhireye Khwarazmshahi, completed his studies under his guidance.