Rather, “Only in Jehovah shall men say of me (this clause is parenthetical), is there righteousness” (which includes salvation, Isa 45:21, “a just God and a Savior,” Isa 46:13), etc. [Maurer].
strength - namely, to save.
shall men come - Those who have set themselves up against God shall come to Him in penitence for the past (Isa 19:22).