וְעֹ֤֥שֶׂה חֶ֖֙סֶד֙ לַֽאֲלָפִ֑֔ים לְאֹהֲבַ֖י וּלְשֹׁמְרֵ֥י מצותו [מִצְוֺתָֽי׃] (ס)
愛我、遵守我誡命的，我必向他們施慈愛，直到千代。
Mishneh Torah, Negative Mitzvot
Not to swear needlessly, as it is said, “Thou shalt not take the name of the Lord, thy God, in vain” (Ex. 20:7).