Skandapurana 6.3.18.2

6.3.18.2

tato mukhāttasya ghanā maholbaṇā niścerurindrāyudhatulyarūpāḥ .
ghorāḥ payodā jagadandhakāraṃ kurvanta īśānavaraprayuktāḥ .. 18.2 ..

then from his mouth extremely terrible clouds issued forth, resembling rainbows; / dreadful clouds, making the universe dark, dispatched by the supreme command of Īśāna,