SB 4.9.44
athajighran muhur murdhni
sitair nayana-varibhih
snapayam asa tanayam
jatoddama-manorathah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Reunion with Dhruva Maharaja fulfilled King Uttanapada’s long-cherished desire, and for this reason he smelled Dhruva’s head again and again and bathed him with torrents of very cold tears.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
By nature’s way, when a man cries, there may be two causes. When one cries in great happiness upon the fulfillment of some desire, the tears coming forth from the eyes are very cold and pleasing, whereas tears in times of distress are very hot.