Shiva Purana
ॐकारजं च यल्लिंगं कर्दमेशमिति श्रुतम् ॥ प्रसिद्धं बिन्दुसरसि सर्वकामफलप्रदम् ॥ ३८ ॥
The Upaliṅga of Oṃkāra is famous as Kardameśa in the Bindu lake and yields the fruits of all desires.
english translation
OMkArajaM ca yalliMgaM kardamezamiti zrutam ॥ prasiddhaM bindusarasi sarvakAmaphalapradam ॥ 38 ॥
hk transliteration by Sanscript