חָלְק֤וּ ׀ מַחְמָאֹ֣ת פִּיו֮ וּֽקֲרָב־לִ֫בּ֥וֹ רַכּ֖וּ דְבָרָ֥יו מִשֶּׁ֗מֶן וְהֵ֣מָּה פְתִחֽוֹת׃
他口中的話比奶油更滑，心裡卻懷著爭戰；他的言語比油更柔，其實都是出鞘的刀劍。
Rashi
Smooth were Heb. חלקו, an expression of (above 35:6): “and slippery (וחלקלקות).”
Rashi
the buttery words of his mouth Heb. מחמאת, an expression of חמאה butter. The first “mem” is a defective radical in the word, like the “mem” of מעשה and the “mem” of מאמר.
Rashi
but they are curses Heb. פתחות. Menachem (p. 147) interpreted it as an expression of swords, as (Micah 5:5): “and the land of Nimrod with its swords (בפתחיה),” with the edges of the sword. I say, however, that it is an expression of curse in Aramaic, as the Talmud (R.H. 31b) states: Amemar wrote a pethicha on her, which is a warrant decreeing excommunication.