Jamieson, Fausset & Brown

sworn by myself--equivalent to, "As I live," as Rom 14:11 quotes it. So Num 14:21. God could swear by no greater, therefore He swears by Himself (Heb 6:13, Heb 6:16). word . . . in righteousness--rather, "the truth (see on Isa 45:19) is gone forth from My mouth, the word (of promise), and it shall not return (that is, which shall not be revoked)" [LOWTH]. But the accents favor English Version. tongue . . . swear--namely, an oath of allegiance to God as their true King (see on Isa 19:18; Isa 65:16). Yet to be fulfilled (Zac 14:9).