Shiva Purana
ऐशान्याम्पुरि ते वासं चक्रिरे भक्तवत्सलाः ॥ विरमन्ते सदा तत्र नानालीलाविशारदाः ॥ ३१ ॥
Those Rudras favourably disposed towards their devotees took up their residence in the north-eastern city of Īśāna. Experts in different kinds of sports they sport about there always.
english translation
aizAnyAmpuri te vAsaM cakrire bhaktavatsalAH ॥ viramante sadA tatra nAnAlIlAvizAradAH ॥ 31 ॥
hk transliteration by Sanscript