SB 4.15.21

stāvakāṁs tān abhipretya
 pṛthur vainyaḥ pratāpavān
megha-nirhrādayā vācā
 prahasann idam abravīt
Synonyms: 
stāvakān — engaged in offering prayers; tān — those persons; abhipretya — seeing, understanding; pṛthuḥ — King Pṛthu; vainyaḥ — son of Vena; pratāpa-vān — greatly powerful; megha-nirhrādayā — as grave as the thundering of clouds; vācā — with a voice; prahasan — smiling; idam — this; abravīt — he spoke.
Translation: 
Thus when the greatly powerful King Pṛthu, the son of Vena, saw the professionals before him, to congratulate them he smiled, and with the gravity of the vibrating sounds of clouds he spoke as follows.