Shiva Purana
कृत्वा स्वरूपं दिव्यं च शिवाध्यानं यथा तथा॥ दर्शयित्वा शिवायै तामुवाचावाङ्मुखी शिवः ॥ ५४॥
After assuming that divine form which Pārvatī was meditating upon, Śiva spoke to her as she stood face downwards.
english translation
kRtvA svarUpaM divyaM ca zivAdhyAnaM yathA tathA॥ darzayitvA zivAyai tAmuvAcAvAGmukhI zivaH ॥ 54॥
hk transliteration by Sanscript