אַל־תַּאֲמִ֣ינוּ בְרֵ֔עַ אַֽל־תִּבְטְח֖וּ בְּאַלּ֑וּף מִשֹּׁכֶ֣בֶת חֵיקֶ֔ךָ שְׁמֹ֖ר פִּתְחֵי־פִֽיךָ׃
זאָלט איר ניט גלױבן אין אַ חבֿר, זאָלט איר אײַך ניט פֿאַרזיכערן אױף אַ גוטן פֿרײַנט; פֿון דער װאָס ליגט אין דײַן בוזעם, היט די טירן פֿון דײַן מױל.
Rashi
Believe not a friend [This is to be understood] according to its apparent meaning. But our Sages explained it as referring to the Most High. Do not sin and say that the Holy One, blessed be He, is our Friend, and He will forgive us. [from Hagiga 16a]
Rashi
from her who lies in your bosom—Your soul will testify against you.
Rashi
the openings of your mouth Heb. פִּתְחֵי. The words of your mouth, the openings of your mouth.