Anandakanda 1.15.74

1.15.74

oṃ amṛtagaṇarudragaṇāntāya svāhā /
aṣṭottaraśataṃ japtvā balipūrvaṃ samāharet /
oṃ namo bhagavate rudrāya phaṭ svāhā /
sādhakasya śikhābandhanamantraḥ /
devadālyāśca pañcāṅgaṃ chāyāyāṃ śoṣayetsudhīḥ //

“Oṃ, to the culmination of the troop of immortals and the troop of Rudras, svāhā!” / Having recited [this] one hundred and eight times, one should gather it preceded by an offering. / “Oṃ, obeisance to Lord Rudra, phaṭ svāhā!” / [This is] the practitioner's mantra for tying the topknot. / A wise person should dry the five parts of the devadālī in the shade.