Valmiki Ramayana Ayodhya Kanda Sarga 91 Shloka 31

उत्तरेभ्यः कुरुभ्यः from the kingdom of northern Kurus, दिव्योपभोगवत् with all heavenly delights, वनम् forest, बहुभिः by innumerable, तीरजैः trees growing on the banks, कृता surrounded, दिव्या divine, नदी river, आजगाम came into existence.

From the forests of the northern Kuru kingdom, with all delights of heaven, a divine river with innumerable trees that grow on river banks came into existence.