Valmiki Ramayana Ayodhya Kanda Sarga 37 Shloka 20
Original Shlokaतासामेवंविधा वाच शृण्वन् दशरथात्मजः। बबन्धैव तदा चीरं सीतया तुल्यशीलया।।2.37.20।।
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दशरथात्मज: son of Dasaratha (Rama), तासाम् their, एवंविधाः such ways, वाचः words, शृण्वन् listening, तदा then, तुल्यशीलया similar in nature, सीतया by Sita, चीरम् bark robes, बबन्धैव got them fastened.
While Rama was listening to such words uttered by them, he got the bark robes fastened round Sita who was of similar nature.