Valmiki Ramayana Ayodhya Kanda Sarga 45 Shloka 19

चारित्रवत्सलः fond of probity, घृणाचक्षुः compassionate eyes, सः रामः that Rama, पदातीन् those walking on foot, तान् द्विजातीन् those brahmins, रथेन with the chariot, परिमोक्तुम् to leave them, न शशाक was not possible.

Rama a man of probity and compassion could not ride off in his chariot while those brahmins were trudging far behind.