David ben Abraham al-Fasi (Hebrew: דוד בן אברהם אלפאסי) was a medieval Jewish, Moroccan lexicographer and grammarian from Fez, living in the second half of the 10th century (died before 1026 CE), who eventually settled in the Land of Israel where he is believed to have composed his magnum opus.
Al-Fasi was the author of Kitāb Jāmiʿ al-Alfāẓ ("The Book of Collected Meanings"), one of the earliest known Judeo-Arabic Dictionaries, a work which defines words in the Hebrew Bible.
"[2] Scholars have pointed out that al-Fasi, in all the controversies between the Rabbinites (rabbanim) and the Karaites (maskilim), invariably sides with the latter, often criticizing the views of the former.
[3] His method is concise, bringing down the definition of words as understood by his contemporaries, without mentioning them by name.
[4] Early rabbinic sources, such as the targums (Aramaic translations) of Onqelos and of Jonathan bar Uzziel are alluded to by his use of such titles as al-Targum, al-Suriani and al-Mutarjim.