Vishnupurana 3.13.25

3.13.25

praśnaś ca tatrābhiratir yajamānadvijanmanām
akṣayyam amukasyeti vaktavyaṃ viratau tathā //

"The Śráddha enjoined for an individual is to be repeated on the day of his death (in each month for a year), but without the prayers and rites performed on the first occasion, and without offerings to the Viśwadevas. A single ball of food is to be offered to the deceased, as the purification of one person, and Brahmans are to be fed. The Brahmans are to be asked by the sacrificer if they are satisfied; and upon their assent, the prayer, 'May this ever satisfy such a one' (the deceased) is to be recited.