SB 4.6.24
nanda calakananda ca
saritau bahyatah purah
tirthapada-padambhoja-
rajasativa pavane
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
They also saw the two rivers named Nanda and Alakananda. These two rivers are sanctified by the dust of the lotus feet of the Supreme Personality of Godhead, Govinda.