SB 8.23.9

śrī-bhagavān uvāca
vatsa prahrāda bhadraṁ te
 prayāhi sutalālayam
modamānaḥ sva-pautreṇa
 jñātīnāṁ sukham āvaha
Synonyms: 
śrī-bhagavān uvāca — the Personality of Godhead said; vatsa — O My dear son; prahrāda — O Prahlāda Mahārāja; bhadram te — all auspiciousness unto you; prayāhi — please go; sutala-ālayam — to the place known as Sutala; modamānaḥ — in a spirit of jubilation; sva-pautreṇa — with your grandson (Bali Mahārāja); jñātīnām — of your relatives and friends; sukham — happiness; āvaha — just enjoy.
Translation: 
The Supreme Personality of Godhead said: My dear son Prahlāda, all good fortune unto you. For the time being, please go to the place known as Sutala and there enjoy happiness with your grandson and your other relatives and friends.