Complete Moses' warning in Numbers 32:23: "Be assured that your sin will ___."

Answer: find you out

Moses warned Reuben and Gad that if they failed to help conquer Canaan, they would sin against the LORD, and their sin would find them out.

“But if you do not do this, you will certainly sin against the LORD—and be assured that your sin will find you out.”— Numbers 32:23 (BSB)