Digha Nikaya 1:652
SUJATOEkamidāhaṁ, ānanda, samayaṁ uruvelāyaṁ viharāmi najjā nerañjarāya tīre ajapālanigrodhe paṭhamābhisambuddho.
Ānanda, this one time, when I was first awakened, I was staying in Uruvelā at the goatherd’s banyan tree on the bank of the Nerañjarā River.