tata adaya sa rajña
ksipta rajan sarovare
tad avrtyatmana so ’yam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O Maharaja Pariksit, 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.