Shiva Purana
सर्वं सविस्तरं तस्मै प्रणम्याहुर्मुहुर्मुहुः ॥ मुनिभिः कथितं श्रुत्वा विश्वकर्मा चतुर्मुखः ॥ ३१ ॥
They bowed down to him again and again and explained everything in detail. Hearing the story told by the sages Visvakarma became fourfaced.
english translation
sarvaM savistaraM tasmai praNamyAhurmuhurmuhuH ॥ munibhiH kathitaM zrutvA vizvakarmA caturmukhaH ॥ 31 ॥
hk transliteration by Sanscript