Skandapurana 2.4.23.49

2.4.23.49

iti śrīskāṃde mahāpurāṇa ekāśītisāhasryāṃ saṃhitāyāṃ dvitīye vaiṣṇavakhaṇḍe kārtikamāsamāhātmye dhātrītulasyutpattivarṇanaṃnāma trayoviṃśo'dhyāyaḥ.. 23 ..

Thus ends the twenty-third chapter, named 'Description of the Origin of Dhātrī and Tulasī,' in the Māhātmya of the Month of Kārtika in the second [book], the Vaiṣṇavakhaṇḍa, in the glorious Skanda Purāṇa, a collection of eighty-one thousand [verses]. // 23