Matsyapurana 99.15

99.15

samāpyaivaṃ yathāśaktyā dvādaśa dvādaśīḥ punaḥ
saṃvatsarānte lavaṇaparvatena samanvitām
śayyāṃ dadyānmuniśreṣṭha gurave dhenusaṃyutām //

After observing the fast like this for twelve months, on each Dvâdaśî, the devotee at the conclusion of the year, should give away to his preceptor a bedding, a mount of salt and a cow.—15.