King James Version (KJV)
The LORD hath sworn in truth unto David; he will not turn from it; Of the fruit of thy body will I set upon thy throne.
Modern English
The LORD swore to David a sure oath from which he will not turn back: One of the sons of your body I will set on your throne.
Hebrew
נִשְׁבַּ֤ע יְהוָ֨ה ׀ לְדָוִ֗ד אֱמֶ֥ת לֹא יָשׁ֑וּב מִפְּרִ֥י בִ֝טְנְךָ֗ אָשִׁ֥ית לְכִסֵּא לָֽךְ׃
nishbaʿ yhvah ׀ ldavid ʾemet loʾ yashvb mipriy biṭnka ʾashiyt lkiseʾ lak