Halacha He ruled that the commandment to stand in the presence of the aged (
Leviticus 19:32), which other rabbis believed applies only to an elderly
Talmid Chacham, in fact applies to any aged person. He valued the respect of parents so highly that (according to him) one must abandon fulfilling any
mitzvah that can be fulfilled by another person, if that is necessary to carry out a father's order.
Aggadah He declared that there are five passages in the Pentateuch, each of which contains a word that cannot be positively connected with either the preceding or the following words. This remark was afterward incorporated in the Masorah, where it is noted that "there are five passages in the Pentateuch that have an undecided word." ==References==