Garudapurana 1.23.59.p1

1.23.59.p1

iti śrīgāruḍe mahāpurāṇe pūrvakhaṇḍe prathamāṃśākhye ācārakāṇḍe śivārcananirūpaṇaṃ nāma trayoviṃśo 'dhyāyaḥ

Thus in the glorious Garuḍa Mahāpurāṇa, in the first section called the Pūrvakhaṇḍa, in the Ācārakāṇḍa, the twenty-third chapter, entitled "The Exposition of the Worship of Śiva."