Thus counseled by his teacher, Uddalaka set out for the region he desired. Now that same Ayoda-Dhaumya had another pupil, named Upamanyu. His teacher sent him, saying, "Child Upamanyu, tend the cows." At his teacher's word he tended the cows; having tended them the whole day, at sunset he would return, stand before his teacher, and bow. The teacher, seeing him grown stout, said to him, "Child Upamanyu, what do you feed on? You are quite plump." He answered his teacher, "I sustain myself by begging alms." The teacher said, "Do not eat alms without first reporting to me." He, saying "very well," again tended the cows; having tended them, he returned and, likewise standing before his teacher, bowed. The teacher, seeing him just as stout as before, said, "Child Upamanyu, all your alms, without remainder, I take for myself; on what, then, do you now feed?" He answered, "Having reported the first collection to you, I beg a second time as well; on that I sustain myself." The teacher said, "This is not proper conduct toward a guru; acting so, you deprive others of their sustenance as well. You are greedy." Saying "very well," he again tended the cows; having tended them, he came once more to his teacher's house and, standing before him, bowed. The teacher, seeing him still stout, said again, "I take all your alms, you gather no other -- yet you are plump; on what do you feed?" He answered, "Lord, I sustain myself on the milk of these cows." The teacher said, "You must not drink this milk without my permission." He, having so promised, having tended the cows, came again to his teacher's house, stood before the guru, and bowed. The teacher, seeing him just as stout as before, said, "You do not eat alms, you gather nothing else, you do not drink milk -- yet you are plump; on what, then, do you feed?" He answered, "Lord, I drink the foam which the calves, suckling at their mothers' udders, bring up." The teacher said, "These good calves, out of compassion for you, bring up too much foam; so in this way too you deprive the calves of their food. Acting so, you ought not to drink even the foam." Having so promised, Upamanyu, without any food, went on tending those cows.