Shiva Purana
तत ऊर्ध्वं न लोकाश्च गोलोकस्तत्समीपतः ॥ गोमातरस्सुशीलाख्यास्तत्र संति शिवप्रिया ॥ ४० ॥
Above that there are no worlds and the world of the universe is nearby There are mothers of cows named Sushila who are dear to Lord Śiva.
english translation
tata UrdhvaM na lokAzca golokastatsamIpataH ॥ gomAtarassuzIlAkhyAstatra saMti zivapriyA ॥ 40 ॥
hk transliteration by Sanscript