וְ֠הָבִיאוּ אֶת־אֲחִיכֶ֣ם הַקָּטֹן֮ אֵלַי֒ וְאֵֽדְעָ֗ה כִּ֣י לֹ֤א מְרַגְּלִים֙ אַתֶּ֔ם כִּ֥י כֵנִ֖ים אַתֶּ֑ם אֶת־אֲחִיכֶם֙ אֶתֵּ֣ן לָכֶ֔ם וְאֶת־הָאָ֖רֶץ תִּסְחָֽרוּ׃
And bring your youngest brother unto me; then shall I know that ye are no spies, but that ye are upright men; so will I deliver you your brother, and ye shall traffic in the land.’
Read kabbalistic (mystical) interpretation of Genesis 42:34: and classical mystical sources.