Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 17-18

Sanskrit:

नम: कारणमत्स्याय प्रलयाब्धिचराय च ।हयशीर्ष्णे नमस्तुभ्यं मधुकैटभमृत्यवे ॥ १७ ॥अकूपाराय बृहते नमो मन्दरधारिणे ।क्षित्युद्धारविहाराय नम: शूकरमूर्तये ॥ १८ ॥

ITRANS:

namaḥ kāraṇa-matsyāyapralayābdhi-carāya cahayaśīrṣṇe namas tubhyaṁmadhu-kaiṭabha-mṛtyave

Translation:

I offer my obeisances to You, the cause of the creation, Lord Matsya, who swam about in the ocean of dissolution, to Lord Hayagrīva, the killer of Madhu and Kaiṭabha, to the immense tortoise [Lord Kūrma], who supported Mandara Mountain, and to the boar incarnation [Lord Varāha], who enjoyed lifting the earth.

Purport:

The Viśva-kośa dictionary states that the word akūpārāya indicates the king of tortoises.