Vaishnava Dharmashastra 68.8

68.8

parvaṇi ca yadā kṛtaṃ manyeta parva ||

On the days of new and full moon (he may eat at that time) when he supposes the sacrifice customary on those days to have been performed.
[2, 3. Nand. states that in both of these Sûtras it has to be understood, that the bath occasioned by the eclipse must be followed by the ordinary bath, which precedes every meal.
6. An Agnihotrin is one who daily performs the Agnihotra. Regarding the Agnihotra and the times for its performance, see LIX, 2.
7. The term Vaisvadeva includes not only the oblation to the Visvedevâs (LXVII, 3), but also the Bali-offerings and the entertainment of a guest, &c., as prescribed in LXVII, 4 seq. (Nand.)
8. According to Nand., the use of the particle ka implies, that this rule applies equally to the first days of the moon's increase and wane.]