Yahweh uses an exaggerated image of people fleeing to Sheol or heaven to try to escape being killed. Here "Sheol" and "heaven" are a merism that represents all places. Alternate translation: "Even if they were to flee to Sheol or to heaven, they would not be able to escape me" (See: [[rc://en/ta/man/jit/figs-hyperbole]] and [[rc://en/ta/man/jit/figs-merism]])