Arukh LaNer is a 19th-century Talmud commentary by Rabbi Yaakov Ettlinger. Ettingler chose to compile commentaries on tractates of Talmud for which less commentary existed. In his introduction to the first published volume, Yevamot, he writes that his commentary is modeled after that of the Penei Yehoshua. Like the latter, Arukh LaNer focuses on difficulties or contradictions within Rashi’s Talmud commentary. Ettingler often compares Rashi’s comments in different tractates and even occasionally considers Rashi’s Torah commentary. Arukh LaNer includes commentary on both aggadic and halakhic sections of the Talmud, something characteristic of German scholarship at the time but uncommon in certain eastern European schools.