Valmiki Ramayana Kishkindha Kanda Sarga 5 Shloka 16
Original Shlokaततोऽग्निं दीप्यमानं तौ चक्रतुश्च प्रदक्षिणम्।।4.5.16।। सुग्रीवो राघवश्चैव वयस्यत्वमुपागतौ।
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ततः then, तौ both of them, दीप्यमानम् blazing, अग्निम् fire, प्रदक्षिणं चक्रतुः went round, सुग्रीवः Sugriva, राघवश्चैव and Raghava also, वयस्यत्वम् friendship, उपागतौ both established
They both circumambulated the blazing fire and solemnized their friendship.