Vaishnava Dharmashastra 90.1

90.1

mārgaśīrṣaśuklapañcadaśyāṃ mṛgaśirasā yuktāyāṃ cūrṇitalavaṇasya suvarṇanābhaṃ prastham ekaṃ candrodaye brāhmaṇāya pradāpayet ||

If on the fifteenth of the bright half of the month Mârgasîrsha the moon enters the lunar asterism. Mrigasiras, he must give at the time when the moon rises (a vessel with) a golden centre, containing a Prastha of ground salt, to a Brâhmana.