Jer 4:2 | JFB | STEP | 2. And thou-- rather, "And if (carried on from ) thou shalt swear, 'Jehovah liveth,' in truth, &c.", that is, if thou shalt worship Him (for we swear by the God whom we worship; compare ; ; ; ) in sincerity, &c. and the nations-- Rather, this is apodosis to the "if"; then shall the nations bless themselves in (by) Him" ( ). The conversion of the nations will be the consequence of Israel's conversion ( , ; , ).

‏ Jeremiah 4:2

2. And thou--rather, "And if (carried on from Jr 4:1) thou shalt swear, 'Jehovah liveth,' in truth, &c.", that is, if thou shalt worship Him (for we swear by the God whom we worship; compare De 6:13; 10:20; Is 19:18; Am 8:14) in sincerity, &c.

and the nations--Rather, this is apodosis to the "if"; then shall the nations bless themselves in (by) Him" (Is 65:16). The conversion of the nations will be the consequence of Israel's conversion (Psa 102:13, 15; Ro 11:12, 15).