Bhagavatapurana 5.23.5

5.23.5

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yasya pucchāgre 'vākśirasaḥ kuṇḍalī-bhūta-dehasya dhruva upakalpitas tasya lāṅgūle prajāpatir agnir indro dharma iti puccha-mūle dhātā vidhātā ca kaṭyāṃ saptarṣayaḥ tasya dakṣiṇāvarta-kuṇḍalī-bhūta-śarīrasya yāny udagayanāni dakṣiṇa-pārśve tu nakṣatrāṇy upakalpayanti dakṣiṇāyanāni tu savye yathā śiśumārasya kuṇḍalā-bhoga-sanniveśasya pārśvayor ubhayor apy avayavāḥ samasaṅkhyā bhavanti pṛṣṭhe tv ajavīthī ākāśa-gaṅgā codarataḥ //

5. Dhruva is stationed at the end of the tail of that Sisumara that lies in coils with its head downwards; and (a little downwards) on the tail are placed Prajapati, Agni, Indra and Dharma and at the root of the tail, Dhata and Vidhata; and on the hip the seven sages; on the right side of it whose coils are formed from right to left, the constellations marking the northern course (Uttarayana) and on the left those marking the southward course, are stationed, just as the Gangetic porpoise lying in coils has members equal in number on both its sides; on its back lies the Ajaveethi, (the first portion of the southern course); and the heavenly Ganga lies against its stomach.