Shankhayanagrihyasutra 2.10.6

2.10.6

: atha paryukṣya /

He approaches the fire with the verse, 'May Agni (vouchsafe) to me faith and insight, not-forgetting (what I have learned) and memory; may this praiseful Gâtavedas give blessing to us.'
[7. He makes with ashes the tripundhra sign (the sign of three strokes) which is set forth in the (treatise on the) Sauparnavrata, which is revealed, which agrees with the tradition handed down by the ancients, with the five formulas 'The threefold age' (see above, I, 28, 9), one by one, on five (places), viz. the forehead, the heart, the right shoulder and the left, and then on the back.]