Shiva Purana
चतुर्मुखस्तु ब्रह्मत्वे कालत्वे चांतकस्स्मृतः ॥ सहस्रमूर्धा पुरुषस्तिस्रोवस्थास्स्वयंभुवः ॥ २६ ॥
He is four-faced as creator; as destroyer he is Kāla and as Puruṣa he has thousand heads. The self-born has thus three states.
english translation
caturmukhastu brahmatve kAlatve cAMtakassmRtaH ॥ sahasramUrdhA puruSastisrovasthAssvayaMbhuvaH ॥ 26 ॥
hk transliteration by Sanscript