Shiva Purana
ततश्शिवेन सम्प्रोक्ष्य शिष्यं शिरसि पूर्ववत् ॥ विलयं शांत्यतीतायाः शक्तितत्त्वे ऽथ चिंतयेत् ॥ ३६ ॥
Sprinkling then the disciple on the head as before with Śiva mantra he shall think of the merging of Śāntyatītakalā in the Śakti Tattva.
english translation
tatazzivena samprokSya ziSyaM zirasi pUrvavat ॥ vilayaM zAMtyatItAyAH zaktitattve 'tha ciMtayet ॥ 36 ॥
hk transliteration by Sanscript