Mahabharata 15.45.15
अग्नींस्तु याजकास्तत्र जुहुवुर्विधिवत्प्रभोदृश्यतोऽदृश्यतश्चैव वने तस्मिन्नृपस्य ह
agnīṃstu yājakāstatra juhuvurvidhivatprabhodṛśyato'dṛśyataścaiva vane tasminnṛpasya ha
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book