Valmiki Ramayana Bala Kanda Sarga 1 Shloka 23
Original Shlokaस सत्यवचनाद्राजा धर्मपाशेन संयत: । विवासयामास सुतं रामं दशरथ: प्रियम् ।।1.1.23।।
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स: दशरथ: Dasaratha, सत्यवचनात् due to being truthful to his word, धर्मपाशेन by the bond of duty, संयत: restrained, प्रियं सुतम् beloved son, रामम् Rama, विवासयामास sent (to the forest).
Dasaratha, true to his word and restrained by the bond of duty, sent his beloved son Rama to the forest.