Valmiki Ramayana Bala Kanda Sarga 34 Shloka 11
Original Shlokaसा तु सत्यवती पुण्या सत्ये धर्मे प्रतिष्ठिता। पतिव्रता महाभागा कौशिकी सरितां वरा।।1.34.11।।
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सा सत्यवती that Satyavati, पुण्या sacred, सत्ये in truth, धर्मे in righteousness, प्रतिष्ठिता established, पतिव्रता chaste, महाभागा holy, सरितां वरा best among rivers, कौशिकी Kausiki.
Satyavati is sacred, firmly established in truth and righteousness. She is chaste holy and best among rivers. She is known as river Kausiki.