Mbh 1.3.9a

“The name of another of Ayoda-Dhaumya’s disciples was Upamanyu. And Dhaumya appointed him saying, ‘Go, my child, Upamanyu, look after the kine.’ And according to his preceptor’s orders, he went to tend the kine. And having watched them all day, he returned in the evening to his preceptor’s house and standing before him he saluted him respectfully. And his preceptor seeing him in good condition of body asked him, ‘Upamanyu, my child, upon what dost thou support thyself? Thou art exceedingly plump.’ And he answered, ‘Sir, I support myself by begging’. And his preceptor said, ‘What is obtained in alms should not be used by thee without offering it to me.’ And Upamanyu, thus told, went away. And having obtained alms, he offered the same to his preceptor. And his preceptor took from him even the whole. And Upamanyu, thus treated, went to attend the cattle. And having watched them all day, he returned in the evening to his preceptor’s abode. And he stood before his preceptor and saluted him with respect. And his preceptor perceiving that he still continued to be of good condition of body said unto him, ‘Upamanyu, my child, I take from thee even the whole of what thou obtainest in alms, without leaving anything for thee. How then dost thou, at present, contrive to support thyself?’ And Upamanyu said unto his preceptor, ‘Sir, having made over to you all that I obtain in alms, I go a-begging a second time for supporting myself.’ And his preceptor then replied, ‘This is not the way in which thou shouldst obey the preceptor. By this thou art diminishing the support of others that live by begging. Truly having supported thyself so, thou hast proved thyself covetous.’ And Upamanyu, having signified his assent to all that his preceptor said, went away to attend the cattle. And having watched them all day, he returned to his preceptor’s house. And he stood before his preceptor and saluted him respectfully.