King James Version (KJV)
For truly my words shall not be false: he that is perfect in knowledge is with thee.
Modern English
For truly my words are not false; one who is perfect in knowledge is with you.
Hebrew
כִּ֤י אָמְנָ֨ם ׀ לֹא שֶׁ֣קֶר מִ֭לָּי תְּמִ֣ים דֵּע֑וֹת עִמָּֽךְ׃
kiy ʾamnam ׀ loʾ sheqer milay tmiym deʿvot ʿimak