Kaushitakagrihyasutra 3.15.4

3.15.4

madhyamāyāṃ māghyā varṣe ca mahāvyāhṛtayaścatasro juhoti ye tātṛṣuḥ iti catasro 'nudrutya vapāṃ juhuyāt vaha vapāṃ jātavedaḥ pitṛbhyo yatrainān vettha sukṛtasya loke \ medasaḥ kulyā upasrutāssravanti satyāssantu yajamānasya kāmāssvāhā \ iti mahāvyāhṛtibhiścatasṛbhiḥ ye tātṛṣuḥ iti catasṛbhiraṣṭāvāhutīḥ sthālīpāko 'vadānamiśraḥ \4\

At the middle one, on the full moon day of Māgha or in the rainy season, he offers the four great mystical utterances. Having recited the four [verses beginning with]: 'Those who were thirsty', he should offer the omentum, with: 'Carry the omentum, O Jātavedas, to the fathers where you know them in the world of good deeds! May streams of fat flow forth, reaching them; may the desires of the sacrificer be true, svāhā!' With the four great mystical utterances and with the four [verses beginning with]: 'Those who were thirsty', [he makes] eight oblations, the boiled sacrificial mess mixed with the portions cut off [from the victim].