וְאִם־תַּגִּ֖ידִי אֶת־דְּבָרֵ֣נוּ זֶ֑ה וְהָיִ֣ינוּ נְקִיִּ֔ם מִשְּׁבֻעָתֵ֖ךְ אֲשֶׁ֥ר הִשְׁבַּעְתָּֽנוּ׃
But if thou utter this our business, then we will be guiltless of thine oath which thou hast made us to swear.’
Read midrashic interpretation of Joshua 2:20: and classical rabbinic exegesis.