King James Version (KJV)
That I might make thee know the certainty of the words of truth; that thou mightest answer the words of truth to them that send unto thee?
Modern English
to make you know what is right and true, that you may give a true answer to those who sent you?
Hebrew
לְהוֹדִ֣יעֲךָ֭ קֹשְׁטְ֣ אִמְרֵי אֱמֶ֑ת לְהָשִׁ֥יב אֲמָרִ֥ים אֱ֝מֶת לְשֹׁלְחֶֽיךָ׃
lhvodiyʿaka qoshṭ ʾimrey ʾemet lhashiyb ʾamariym ʾemet lsholḥeyka