Reference for I Kings 14:30

וּמִלְחָמָ֨ה הָיְתָ֧ה בֵין־רְחַבְעָ֛ם וּבֵ֥ין יָרָבְעָ֖ם כָּל־הַיָּמִֽים׃

And there was war between Rehoboam and Jeroboam continually.

BDB