By going to four kings in succession you will get the full complement of eight hundred (horse) and I too shall have four sons.
नृपेभ्यो हि चतुर्थ्यस्ते पूर्णान्यष्टौ शतानि मे। भविष्यन्ति तथा पुत्रा मम चत्वार एव च।॥