Saʿd al-Dawla ibn Ṣafī ibn Hibat Allāh ibn Muhadhdhib al-Dawla al-Abharī (Arabic: سعد الدولة بن هبة الله بن محاسب ابهري‎) (c. 1240 – March 5, 1291) was a Jewish physician and statesman in thirteenth-century Persia (Iran). Originally from the town of Abhar in western Iran, he was grand vizier from 1289 to 1291 under the Mongolian Ilkhan in Persia, Arghun Khan. According to Abu al-Faraj, Sa'ad was father-in-law of the prefect of Baghdad. Sa'ad held a position in the treasury department, where he so distinguished himself that the Mongolian governor was jealous and recommended him to court as a physician. Here Sa'ad made a friend of Ordu Kia, a powerful general, and through his influence was sent to collect the arrears of taxes in Baghdad. He was so successful in raising money that Arghun appointed him assistant (musharrif) in the department of finances at Baghdad, Ordu Kia being appointed military governor, or emir, of that province. The historian Wassaf says that Sa'ad cured Arghun of an illness, and, having thus gained his confidence, informed the Ilkhan of the corruption among the officials at Baghdad. At the same time he impressed Arghun with his own ability by his knowledge of the Mongolian and Turkish languages, and by his intimate acquaintance with the conditions existing in the province. He was soon made general controller of the finances of Baghdad, and then of the whole empire, becoming grand vizier. "Thus," remarks Abu al-Faraj, "were the Muslims reduced to having a Jew in the place of honor," a situation which they greatly resented. Arghun, as a Lamaist Buddhist, had no such compunctions.