King James Version (KJV)
So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper {in the thing} whereto I sent it.
Modern English
so is my word that goes out of my mouth: it will not return to me void, but it will accomplish that which I please, and it will prosper in the thing I sent it to do.
Hebrew
כֵּ֣ן יִֽהְיֶ֤ה דְבָרִי֙ אֲשֶׁ֣ר יֵצֵ֣א מִפִּ֔י לֹֽא־יָשׁ֥וּב אֵלַ֖י רֵיקָ֑ם כִּ֤י אִם־עָשָׂה֙ אֶת־אֲשֶׁ֣ר חָפַ֔צְתִּי וְהִצְלִ֖יחַ אֲשֶׁ֥ר שְׁלַחְתִּֽיו׃
ken yihyeh dbariy ʾasher yeṣeʾ mipiy loʾ-yashvb ʾelay reyqam kiy ʾim-ʿashah ʾet-ʾasher ḥapaṣtiy vhiṣliyḥa ʾasher shlaḥtiyv