Shiva Purana

siva.sh/siva-purana/rudra-samhita/15/56

त्रिमूर्तीनां महेशस्य प्रादुरासीद्घृणानिधिः ।। आर्द्धनारीश्वरो भूत्वा पूर्णाशस्सकलेश्वरः ।। ५६ ।।

sanskrit

From Mahesha (the Great Lord) of the Trimūrti, there manifested a treasure-house of compassion. Taking the form of Ardhanārīśvara, he became the complete embodiment of will, the Lord of All (Sakaleśvara).

english translation

trimUrtInAM mahezasya prAdurAsIdghRNAnidhiH || ArddhanArIzvaro bhUtvA pUrNAzassakalezvaraH || 56 ||

hk transliteration by Sanscript