רַע־יֵ֭רוֹעַ כִּי־עָ֣רַב זָ֑ר וְשֹׂנֵ֖א תֹקְעִ֣ים בּוֹטֵֽחַ׃
He that is surety for a stranger shall smart for it; But he that hateth them that strike hands is secure.
Read kabbalistic (mystical) interpretation of Proverbs 11:15: and classical mystical sources.