Valmiki Ramayana Sundara Kanda Sarga 35 Shloka 52
Original Shlokaरामसुग्रीवयोरैक्यं देव्येवं समजायत। हनुमन्तं च मां विद्धि तयोर्दूतमिहागतम्।।5.35.52।।
1 source checked for this shloka
देवि Oh Illustrious lady, रामसुग्रीवयोः of both Rama and Sugriva, ऐक्यम् alliance, एवम् in that way, समजायत established, माम् me, तयोः their, दूतम् messenger, आगतम् came here, हनुमन्तम् Hanuman, विद्धि you may know.
"Oh Illustrious lady In that manner alliance was established between Rama and Sugriva. Know me to be Hanuman, arrived here as their messenger.