R. Isaac b. Jacob Alfasi (known as Rif; 1013–1103), author of the most important code prior to the Mishneh Torah of Maimonides. Alfasi was a native of Qal'at Hammad near Constantine, in Algeria, and is therefore sometimes called "ha-Kala'i." According to R. Abraham ibn David, Alfasi studied in Kairouan under both R. Nissim ben Jacob and R. Hananel b. Hushi'el, but nowhere does Alfasi mention them as his teachers. After a period of study in Kairouan, Alfasi settled in Fez (hence his surname "Alfasi" or Rif, initials of R. Isaac Fasi). He remained there until 1088, when, in his 75th year, he was denounced to the government by enemies and was forced to flee to Spain. After a few months in Cordova he moved to Lucena, where he remained until his death.
חלק ב: סדר נשים (מסכת חולין) חלק שני מספר ... רב אלפס.