This verse, from the biblical Book of Joshua, is a key part of the story of Rahab and the Israelite spies. It essentially lays out the terms of Rahab's protection:

"But if you talk about this business of ours..." - This refers to the fact that Rahab is helping the Israelite spies hide from the authorities of Jericho, knowing they are scouting the land before an invasion. "This business" encompasses her knowledge of their mission and her assistance in concealing them.

"...then we shall be guiltless of your oath which you’ve made us to swear." - The spies had sworn an oath to Rahab that they would spare her and her family when they conquered Jericho, in exchange for her help. This clause states that if Rahab reveals their presence or their mission to anyone (particularly the people of Jericho), the spies are released from their obligation to protect her. Their oath would become null and void.

In simpler terms:

"If you tell anyone about our secret mission and how you're helping us, then we won't be bound by our promise to keep you and your family safe during the attack."

Significance:

Conditional Protection: This verse makes it clear that Rahab's safety hinges on her discretion and loyalty. She must keep the secret of the spies' presence to maintain the protection they promised.
Importance of Secrecy: It highlights the importance of keeping their mission secret to ensure its success and the safety of the spies.
Focus on covenantal obligations The safety of Rahab and the future of her family hinges on keeping her word and not breaking the agreement.