Śatapatha Brāhmaṇa ("of a hundred paths") 3.8.3.19

3.8.3.19

athopabhṛti | tryaṅgyasya doṣṇo gudaṃ dvedhā kṛtvāvadyati tryaṅgyāyai śroṇeratha hiraṇyaśakalāvavadadhātyathopariṣṭādājyasyābhighārayati

Then into the upabhrit, he makes a portion of the upper part of the fore-foot belonging to the tryaṅga (viz. the right one); of the (narrow piece of the) hind-part, after dividing it in two; and of the haunch belonging to the tryaṅga (viz. the left). Thereupon he puts two pieces of gold on (the flesh oblations in the spoons) and pours ghee thereon.