Skandapurana 6.3.102.10

6.3.102.10

godānaṃ pāṇḍavaśreṣṭha trayodaśyāṃ prakārayet .
caitre māsi site pakṣe tatra gatvā jitendriyaḥ .. 102.10 ..

A gift of a cow should be made, O best of Pāṇḍavas, on the thirteenth day; / having gone there in the bright fortnight of the month of Caitra with subdued senses,