Skandapurana 2.5.13.128

2.5.13.128

iti śrīskāṃde mahāpurāṇa ekāśītisāhasryāṃ saṃhitāyāṃ dvitīye vaiṣṇavakhaṇḍe brahmaviṣṇu saṃvāde mārgaśīrṣamāsamāhātmya ekādaśīvratajāgaraṇaphalakathanaṃnāma trayodaśo'dhyāyaḥ .. 13 ..

Thus ends the thirteenth chapter, titled “The Declaration of the Fruits of Keeping the Vigil on the Eleventh-Day Vow” in the Māhātmya of the Month of Mārgaśīrṣa, in the dialogue between Brahmā and Viṣṇu, in the second [section], the Vaiṣṇavakhaṇḍa, of the glorious Skanda Mahāpurāṇa, in the collection of eighty-one thousand [verses].