Skandapurana 16.239.19

16.239.19

.. īśvara uvāca .. ..
śṛṇu devi pravakṣyāmi tasmindṛṣṭe tu yatphalam ..
gośatasya prayāgeṣu samyagdattasya yatphalam ..
tatphalaṃ samavāpnoti nāgarārkasya darśanāt.. 19..

Īśvara said:
Hear, O goddess, I shall explain the fruit obtained when it is seen: / The fruit of a hundred cows properly gifted at Prayāga, / that fruit one obtains from the darśana of Nāgarārka.