Garudapurana 1.6.73.p1

1.6.73.p1

iti śrīgāruḍe mahāpurāṇe pūrvakhaṇḍe prathamāṃśākhye ācārakāṇḍe uttānapādavaṃśādivarṇanaṃ nāma ṣaṣṭho 'dhyāyaḥ

Thus in the glorious Garuḍa Mahāpurāṇa, in the first section called the first part, in the ritual section on conduct, the sixth chapter, named 'Description of the Lineage of Uttānapāda and Others'.