Joshua 2:14

14 “Our lives for your lives!” the men assured her. “If you don’t tell what we are doing, we will treat you kindly and faithfully when the LORD gives us the land.”

Read Joshua 2:14 Using Other Translations

And the men answered her, Our life for yours, if ye utter not this our business. And it shall be, when the LORD hath given us the land, that we will deal kindly and truly with thee.
And the men said to her, "Our life for yours even to death! If you do not tell this business of ours, then when the LORD gives us the land we will deal kindly and faithfully with you."
“We offer our own lives as a guarantee for your safety,” the men agreed. “If you don’t betray us, we will keep our promise and be kind to you when the LORD gives us the land.”