Garudapurana 1.1.35.p1

1.1.35.p1

iti śrīgāruḍe mahāpurāṇe pūrvakhaṇḍe prathamāṃśākhye karmakāṇḍe etatpurāṇapravṛttihetunirūpaṇaṃ nāma prathamo 'dhyāyaḥ

Thus ends the first chapter, named 'The Exposition of the Reason for the Origin of this Purāṇa', in the ritual section called the first division of the first section in the glorious Garuḍa Mahāpurāṇa.