Shiva Purana
अनुग्रहमयं चक्रं शांत्यतीतकलामयम् ॥ सदाशिवाधिष्ठितं च परमं पदमुच्यते ॥ ३१॥
The Anugraha cakra is the greatest bliss presided over by Sadāśiva. It consists of the digit beyond calmness.
english translation
anugrahamayaM cakraM zAMtyatItakalAmayam ॥ sadAzivAdhiSThitaM ca paramaM padamucyate ॥ 31॥
hk transliteration by Sanscript