Śatapatha Brāhmaṇa ("of a hundred paths") 2.6.3.3

2.6.3.3

tasyāvṛt | nopakirantyuttaravediṃ na gṛhṇanti pṛṣadājyaṃ na manthantyagnim pañca prayājā bhavanti trayo 'nuyājā ekaṃ samiṣṭayajuḥ

The mode of its performance (is as follows): They prepare no uttaravedi; they do not use clotted butter; nor do they churn the fire. There are five fore-offerings, three after-offerings, and one Samishtayagus.