22:41:10
The reference on the title page to Moses’ negative qualities appears at the end of Kiddushin in the commentary on Mishnayot entitled Tiferet Yisrael (first published between 1810 and 1850) by R. Israel ben Gedaliah Lipschuetz’s (Lipschütz, 1782-1860), rabbi at Dessau and afterwards at Danzig. R. Lipschuetz’s purpose was not to demonstrate Moses’ negative traits but, based on this story, to show how he overcame them so that he became who he was and was able to receive the Torah on Mount Sinai. Recent scholarship now believes that the story to be of medieval origin from non-Jewish sources.
הסכמות: ר' מרדכי פיינשטיין, נאווא אלקסנדראווסקי, כה אייר תרנ"ד; ר' אלי' דוד ב"ר בנימין ראבינאוויץ תאומים, מיר, פורים קטן תרנ"ד.