אַל־תַּאֲמִ֣ינוּ בְרֵ֔עַ אַֽל־תִּבְטְח֖וּ בְּאַלּ֑וּף מִשֹּׁכֶ֣בֶת חֵיקֶ֔ךָ שְׁמֹ֖ר פִּתְחֵי־פִֽיךָ׃
Trust ye not in a friend, Put ye not confidence in a familiar friend; Keep the doors of thy mouth from her that lieth in thy bosom. .
Read Kabbalistic (mystical) interpretations of Micah 7:5: Zohar and classical Jewish mystical sources, free online.