Valmiki Ramayana Ayodhya Kanda Sarga 40 Shloka 43

बद्धवत्सा fastened calf, वत्सला affectionate, अगारं प्रति towards the shed, आयन्ती coming, धेनुः इव like cow, वत्सकारणात् यथा for its calf, राममाता Rama's mother, अभ्यधावत ran behind.

Rama's mother ran after the chariot, like an affectionate cow running towards the shed to join its fastened calf.