King James Version (KJV)
And there was war between Rehoboam and Jeroboam all {their} days.
Modern English
There was war between Rehoboam and Jeroboam continually.
Hebrew
וּמִלְחָמָ֨ה הָיְתָ֧ה בֵין־רְחַבְעָ֛ם וּבֵ֥ין יָרָבְעָ֖ם כָּל־הַיָּמִֽים׃
vmilḥamah haytah beyn-rḥabʿam vbeyn yarabʿam kal-hayamiym