Valmiki Ramayana Ayodhya Kanda Sarga 91 Shloka 11

अथ then, अग्निशालाम् fire sanctuary, प्रविश्य entered, आपः water, पीत्वा sipped, परिमृज्य च washing his hands, आतिथ्यस्य for the hospitality, क्रियाहेतोः to provide, विश्वकर्माणम् to Visvakarma, आह्वयत् invoked.

Then Bharadwaja entered the fire sanctuary, sipped water and washed his hands with water and invoked Visvakarma to provide hospitality.