Aaron ben Moses ben Asher

[3][6] Some examples of evidence for this assertion include: A turning point came in the 1950s when Benjamin Klar discovered that an anti-Karaite polemical poem by Sa‘adia Gaon criticized a Karaite masorete by the name of "ben Asher".

His Sefer Dikdukei ha-Te'amim ('Grammatical Analysis of the Accents') was an original collection of grammatical rules and Masoretic information.

Ben Asher added mesorah (vowelization and cantillation notes) to the Aleppo Codex, correcting its letter-text according to the Masoretic Text.

For over a thousand years, ben Asher has been regarded by Jews of all persuasions as having produced the most accurate version of the Masoretic Text.

Maimonides accepted the views of ben Asher only in regard to open and closed sections,[citation needed] but apparently admired his work generally and helped to establish and spread his authority.