<p style='text-align: justify;'>Unidentified Karaite polemical work on the calendar. It refers to the custom of the Rabbanites (פאן קאלו אלרבאנין אן מחרת הפסח תאני אלעיד), and mentions the Babylonian sage Isaac Nappaḥa (יצחק נפחה), whom the Karaites saw as a significant figure in the setting of the calendar. See Reif (1997: no. 891).</p>