אַ֭חַת נִשְׁבַּ֣עְתִּי בְקָדְשִׁ֑י אִֽם־לְדָוִ֥ד אֲכַזֵּֽב׃
我一次憑我的聖潔起誓：我絕不向大衛說謊。
Rashi
that I will not fail David Heb. אכזב, an expression of (Isa. 58:11): “whose water does not fail (יכזבו),” faliance in Old French, failure; possibly from the Latin fallera, deception.