Agniveshyagrihyasutra 2.7.9.5

2.7.9.5

payodadhipṛṣadājyānām ājyavat saṃskāro na dadhno 'dhiśrayaṇaṃ pratyasanaṃ prativeṣaṇam agni raudrarākṣasapaitṛkanairṛtacchedanabhedananirasanātmābhimarśanāni ca kṛtvā apa upaspṛśet \

The preparation of milk, curd, and speckled butter is like that of clarified butter; there is no setting upon the fire, replacement, or separate serving of curd; having performed acts directed to Agni, Rudra, the Rākṣasas, the ancestors, or Nirṛti, and cutting, breaking, discarding, and touching oneself, one should touch water.