Agniveshyagrihyasutra 3.9.1.9

3.9.1.9

athaitānyasthīnyadbhiḥ prakṣāḷya kaṇyājinaṃ dakṣiṇāgrīvamuttaralomāstīrya tasminnasthīni saṃbharati indro dadhīco asthabhiḥ ityetenānuvākena \

Then, having washed these bones with water, having spread out a black antelope skin with the neck to the south and the hairy side turned up, he collects the bones upon it with this section: 'Indra with the bones of Dadhīca'.