SB 8.16.44-45

bhuñjīta tair anujñātaḥ
 seṣṭaḥ śeṣaṁ sabhājitaiḥ
brahmacāry atha tad-rātryāṁ
 śvo bhūte prathame ’hani
snātaḥ śucir yathoktena
 vidhinā susamāhitaḥ
payasā snāpayitvārced
 yāvad vrata-samāpanam
Synonyms: 
bhuñjīta — should take the prasāda; taiḥ — by the brāhmaṇas; anujñātaḥ — being permitted; sa-iṣṭaḥ — with friends and relatives; śeṣam — the remnants; sabhājitaiḥ — properly honored; brahmacārī — observance of celibacy; atha — of course; tat-rātryām — at night; śvaḥ bhūte — at the end of the night, when the morning comes; prathame ahani — on the first day; snātaḥ — bathing; śuciḥ — becoming purified; yathā-uktena — as stated before; vidhinā — by following the regulative principles; su-samāhitaḥ — with great attention; payasā — with milk; snāpayitvā — bathing the Deity; arcet — should offer worship; yāvat — as long as; vrata-samāpanam — the period of worship is not over.
Translation: 
One should perfectly honor the respectable brāhmaṇas one has fed, and then, after taking their permission, one should take prasāda with his friends and relatives. For that night, one should observe strict celibacy, and the next morning, after bathing again, with purity and attention one should bathe the Deity of Viṣṇu with milk and worship Him according to the methods formerly stated in detail.