Valmiki Ramayana Aranya Kanda Sarga 37 Shloka 3
Original Shlokaन नूनं बुध्यसे रामं महावीर्यं गुणोन्नतम्। अयुक्तचारश्चपलो महेन्द्रवरुणोपमम्।।3.37.3।।
1 source checked for this shloka
अयुक्तचारः a man who does not employ a spy, चपलः fickleminded, महावीर्यम् very brave, गुणोन्नतम् of good qualities, महेन्द्र वरुणोपमम् comparable to Indra and Varuna, रामम् Rama, नूनम् surely, न बुध्यसे not able to know.
You are fickleminded. You have employed no spy ( who could have told you the truth about Rama's character). Rama is very brave and virtuous comparable to Indra and Varuna. Surely you are not able to know what Rama is.