SB 8.24.21

tata ādāya sā rājñā
 kṣiptā rājan sarovare
tad āvṛtyātmanā so ’yaṁ
 mahā-mīno ’nvavardhata
Synonyms: 
tataḥ — from there; ādāya — taking away; — the fish; rājñā — by the King; kṣiptā — being thrown; rājan — O King (Mahārāja Parīkṣit); sarovare — in a lake; tat — that; āvṛtya — covering; ātmanā — by the body; saḥ — the fish; ayam — this; mahā-mīnaḥ — gigantic fish; anvavardhata — immediately developed.
Translation: 
O Mahārāja Parīkṣit, the King took the fish from the well and threw Him in a lake, but the fish then assumed a gigantic form exceeding the extent of the water.