Valmiki Ramayana Ayodhya Kanda Sarga 21 Shloka 54

धर्मे in righteousness, स्थितः abiding, सः that Rama, विसंज्ञकल्पाम् like one who has fallen into a swoon, मातरं चैव to his mother also, अभिप्रतप्तम् tormented with suffering, सौमित्रिम् to Lakshmana, तत्र at that time, यथा in such a way, वक्तुम् to speak, स एव he alone, अर्हति is competent (in that way), धर्म्यम् endowed with righteousness, वाक्यम् words, उवाच said.

Rama, centred on righteousness, again addressed his mother who had almost fainted and Lakshmana who was deeply distressed. As his words were consistent with righteousness, he alone was competent to speak that way.