⁴ tn Alternately, “to obey.” The term לִשְׁמֹעַ (lishmoaʿ, preposition plus Qal infinitive construct from שָׁמַע, shamaʿ, “to hear”) may be taken in one of two ways: (1) literal: “to listen” in contrast to speak or (2) figurative (metonymy of cause for effect) “to obey” in contrast to sacrifice (HALOT 1572 s.v. שׁמע 4; BDB 1033-34 s.v. שָׁמַע). The LXX took the term in the literal sense: τοῦ ἀκούειν (tou akouein, “to listen”). The English versions reflect both literal and figurative options: “obedience” (NJPS, Douay, NAB, NEB) versus “to hear [or listen]” (KJV, ASV, YLT, MLB, RSV, NASB, NIV, NRSV). The section warns against rash vows therefore, the nuance “to listen” is more appropriate: the wise man will be slow to speak and quick to listen in the presence of God; however, the fool is unrestrained and speaks rashly.

⁶ tn The two expressions are כְבַד־פֶּה (kh^evad peh, “heavy of mouth”), and then כְבַד לָשׁוֹן (kh^evad lashon, “heavy of tongue”). Both use genitives of specification, the mouth and the tongue being what are heavy—slow. “Mouth” and “tongue” are metonymies of cause. Moses is saying that he has a problem speaking well. Perhaps he had been too long at the other side of the desert, or perhaps he was being a little dishonest. At any rate, he has still not captured the meaning of God’s presence. See among other works, J. H. Tigay, “‘Heavy of Mouth’ and ‘Heavy of Tongue’: On Moses’ Speech Difficulty,” BASOR 231 (1978): 57-67.