tataḥ pāhi mahā-bhāga
pūrvaiḥ saha gataṁ tamaḥ
yathā tarema duṣpāraṁ
prajayā tad vidhehi naḥ
tataḥ - therefore, because of this; pāhi - kindly save; mahā-bhāga - O great sage; pūrvaiḥ saha - along with my forefathers; gatam - gone; tamaḥ - to darkness; yathā - so that; tarema - we can cross; duṣpāram - very difficult to cross; prajayā - by getting a son; tat - that; vidhehi - kindly do; naḥ - for us.
According to Vedic civilization, one gets married simply to have a son, who is needed to offer oblations to his forefathers. King Citraketu responsibly desired to beget a child so that he and his forefathers might be delivered from the darkest regions. He was concerned with how to get piṇḍa, oblations, in the next life, not only for himself but also for his forefathers. Therefore he requested Aṅgirā Ṛṣi to favor him by doing something that could help him get a son.