King James Version (KJV)
His flesh shall be fresher than a child's: he shall return to the days of his youth:
Modern English
let his flesh become fresh with youth; let him return to the days of his youthful vigor;
Hebrew
רֻטֲפַ֣שׁ בְּשָׂר֣וֹ מִנֹּ֑עַר יָשׁ֖וּב לִימֵ֣י עֲלוּמָֽיו׃
ruṭapash bsharvo minoʿar yashvb liymey ʿalvmayv