Hilkhot Rav Alfas yo. l. ʿal-pi defus Ḳushṭa 269 u-ve-hashvaʾah le-khitve-yad - Alfasi, Yitsḥaḳ ben Yaʿaḳov 1013-1103 (Mosad ha-Rav Ḳuḳ, 1969)