Śatapatha Brāhmaṇa ("of a hundred paths") 3.6.3.5

3.6.3.5

taddhaike | caturdhā kurvanti yatrāhavanīyamuddharanti tāsūpayamanīṣu caturbhāgamakṣaṃ caturbhāgeṇopāñjantyetāsūpayamanīṣu caturbhāgaṃ jaghanena gārhapatyaṃ caturbhāgam parikirati

Now some divide it (the dust) into four parts: one fourth part (they put) into the under-layer whereon they take up the Âhavanîya (for transferring it to the high altar); with one fourth part they anoint the axle; one fourth part (they put) into this underlayer (for taking out the Âgnîdhrîya fire); and one fourth part he scatters about behind the Gârhapatya.