King James Version (KJV)
If they obey and serve him, they shall spend their days in prosperity, and their years in pleasures.
Modern English
If they listen and serve him, they complete their days in prosperity, and their years in pleasantness.
Hebrew
אִם יִשְׁמְע֣וּ וְ֭יַעֲבֹדוּ יְכַלּ֣וּ יְמֵיהֶ֑ם בַּ֝טּ֗וֹב וּשְׁנֵיהֶ֥ם בַּנְּעִימִֽים׃
ʾim yishmʿv vyaʿabodv ykalv ymeyhem baṭvob vshneyhem banʿiymiym