Śatapatha Brāhmaṇa ("of a hundred paths") 3.7.1.9

3.7.1.9

sa prasyati | agreṇīrasi svāveśa unnetṝṇāmiti purastādvā asmādeṣo 'pacidyate tasmādāhāgreṇīrasi svāveśa unnetṝṇāmityetasya vittādadhi tvā sthāsyatītyadhi hyenaṃ tiṣṭhati tasmādāhaitasya vittādadhi tvā sthāsyatīti

He throws it in with (Vâg. S. VI, 2), 'Thou art a leader, easy of access to the Unnetris;' for that (chip) is cut from it in front, wherefore he says, 'Thou art a leader, easy of access to the Unnetris.' 'Be thou mindful of this: it will stand upon thee!' for it (the stake) will indeed stand on it, wherefore he says, 'Be thou mindful of this: it will stand upon thee.'