Atharvavedaparishishta 9.1.2

9.1.2

tilānāṃ tu vicitrāṇāṃ dhenuṃ vatsaṃ ca kārayet | droṇasya vatsakaṃ kuryāc caturdroṇā tu gauḥ smṛtā ||

One should fashion a cow and a calf out of variegated sesame seeds: / one should make the calf with one droṇa, but the cow is traditionally remembered as made of four droṇas.