Valmiki Ramayana Ayodhya Kanda Sarga 62 Shloka 9

नित्यम् always, धर्मपरा righteousminded one, दृष्टलोकवरावरा knower of both the extremities, सा त्वम् such as you, दुःखितापि although grieved, सुदुःखितम् one who is weighed down with grief, विप्रियम् unpleasant words, वक्तुम् to speak, नार्हसि does not behove you.

You always adhere to righteousness. You have seen both the extremes (good and bad) of this world. Athough you yourself are in grief it does not behove you to speak unpleasant words to one who is suffering from a greater grief.