Shiva Purana
तत्रैव च सुपुण्यं च गोकर्णं नाम तद्वनम्॥ तत्रापि योगिनः पुत्र भविष्यंतित्यम्बुसंमिताः ॥ १६॥
It is there itself that the holy forest Gokarṇa exists. There also four Yogin sons will be born of me.
english translation
tatraiva ca supuNyaM ca gokarNaM nAma tadvanam॥ tatrApi yoginaH putra bhaviSyaMtityambusaMmitAH ॥ 16॥
hk transliteration by Sanscript