Apastambagrihyasutra 4.10.9

4.10.9

snātamagnerupasamādhānādyājyabhāgānte pālāśīṃ samidhamuttarayādhāpyottareṇāgniṃ dakṣiṇena padā 'śmānamāsthāpayatyātiṣṭheti \ 9 \

After (the boy) has bathed, and (the ceremonies) from the putting (of wood) on (the fire) down to the Âgyabhâga oblations (have been performed), he causes him to put a piece of Palâsa wood on the fire with the next (verse; M. II, 2, 1), and makes him tread with his right foot on a stone to the north of the fire, with (the verse), 'Tread' (M. II, 2, 2).