Shiva Purana
तिरोभावात्मकं चक्रं भवेच्छान्तिकलामयम् ॥ महेश्वराधिष्ठितं च पदमेतदनुत्तमम् ॥ ९ ॥
The Tirobhāva Cakra consists of the Śāntikalā. This excellent region is presided over by Maheśvara.
english translation
tirobhAvAtmakaM cakraM bhavecchAntikalAmayam ॥ mahezvarAdhiSThitaM ca padametadanuttamam ॥ 9 ॥
hk transliteration by Sanscript