Valmiki Ramayana Sundara Kanda Sarga 58 Shloka 5

गतैः when we go, अस्माभिः we too, तत्र there, यः that which, अर्थः meaningful, वक्तव्यः will tell, यत् that which, तत्र there, रक्षितव्यं च to be hidden, तत् that, आत्मवान् yourself, भवान् you are wise, नः to us, व्याकरोतु tell us in detail.

"You are wise and you should tell us in detail what is to be told and what has to be hidden when we report."