Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 23
Sanskrit:
यस्योरुशृङ्गे जगतीं स्वनावंमनुर्यथाबध्य ततार दुर्गम् ।स एव नस्त्वाष्ट्रभयाद्दुरन्तात्त्राताश्रितान्वारिचरोऽपि नूनम् ॥ २३ ॥
ITRANS:
yasyoru-śṛṅge jagatīṁ sva-nāvaṁmanur yathābadhya tatāra durgamsa eva nas tvāṣṭra-bhayād durantāttrātāśritān vāricaro ’pi nūnam
Translation:
The Manu named King Satyavrata formerly saved himself by tying the small boat of the entire world to the horn of the Matsya avatāra, the fish incarnation. By the grace of the Matsya avatāra, 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 Tvaṣṭā.