'Unless' in the Bible

The men said to her, "We are not bound by this oath you made us swear unless the following conditions are met:

unless, when we enter the land, you tie this scarlet cord to the window through which you let us down. Bring your father, mother, brothers, and all your father’s family into your house.

This is why the Israelites cannot stand against their enemies. They will turn their backs and run from their enemies, because they have been set apart for destruction. I will no longer be with you unless you remove from you what is set apart.