King James Version (KJV)
And Jehoshaphat his son reigned in his stead, and strengthened himself against Israel.
Modern English
Jehoshaphat his son reigned in his place and strengthened himself against Israel.
Hebrew
וַיִּמְלֹ֛ךְ יְהוֹשָׁפָ֥ט בְּנ֖וֹ תַּחְתָּ֑יו וַיִּתְחַזֵּ֥ק עַל יִשְׂרָאֵֽל׃
vayimlok yhvoshapaṭ bnvo taḥtayv vayitḥazeq ʿal yishraʾel