וְשֹׁ֖חַד לֹ֣א תִקָּ֑ח כִּ֤י הַשֹּׁ֙חַד֙ יְעַוֵּ֣ר פִּקְחִ֔ים וִֽיסַלֵּ֖ף דִּבְרֵ֥י צַדִּיקִֽים׃
And thou shalt take no gift; for a gift blindeth them that have sight, and perverteth the words of the righteous.
Read kabbalistic (mystical) interpretation of Exodus 23:8: and classical mystical sources.