SB 6.9.23
yasyoru-srnge jagatim sva-navam
manur yathabadhya tatara durgam
sa eva nas tvastra-bhayad durantat
tratasritan varicaro ’pi nunam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Manu named King Satyavrata formerly saved himself by tying the small boat of the entire world to the horn of the Matsya avatara, the fish incarnation. By the grace of the Matsya avatara, Manu saved himself from the great danger of the flood. May that same fish incarnation save us from the great and fearful danger caused by the son of Tvasta.