Valmiki Ramayana 2.8.22

भविता राघवो राजा राघवस्यानु यः सुतः ।राजवंशात्तु कैकेयि भरतः परिहास्यते॥

bhavitā rāghavo rājā rāghavasyānu yaḥ sutaḥ |rājavaṃśāttu kaikeyi bharataḥ parihāsyate ||

Our plain-language meaning of this verse is waiting for scholar review.