svam svam vatsa-kulam sarve
svam svam-own respective; vatsa-kulam-the group of calves; sarve-all the boys and Krsna and Balarama; payayisyantah-desiring to have them drink water; ekada-one day; gatva-going; jala-asaya-abhyasam-near the water tank; payayitva-after allowing the animals to drink water; papuh jalam-they also drank water.