Vishnupurana 6.6.41

6.6.41

bho nāhaṃ te 'pakārāya prāptaḥ khāṇḍikya mā krudhaḥ
guror niṣkrayadānāya mām avehi tvam āgatam //

Returning then to Keśidhwaja, Kháńd́ikya desired him to propose his question, which he promised to answer; and Keśidhwaja related to him what had happened, the death of the cow, and demanded to know what penance he should perform. Kháńd́ikya, in reply, explained to him fully the expiation that was suited to the occasion; and Keśidhwaja then, with his permission, returned to the place of sacrifice, and regularly fulfilled every necessary act. Having completed the ceremony, with its supplementary rites, Keśidhwaja accomplished all his objects: but he then reflected thus: "The priests whom I invited to attend have all been duly honoured; all those who had any request to make have been gratified by compliance with their desires; all that is proper for this world has been effected by me: why then should my mind feel as if my duty had been unfulfilled?" So meditating, he remembered that he had not presented to Kháńd́ikya the gift that it is becoming to offer to a spiritual preceptor, and, mounting his chariot, he immediately set off to the thick forest where that sage abode. Kháńd́ikya, upon his reappearance, assumed his weapons to kill him; but Keśidhwaja exclaimed, "Forbear, venerable sage. I am not here to injure you, Kháńd́ikya: dismiss your wrath, and know that I have come hither to offer you that remuneration which is due to you as my instructor. Through your lessons I have fully completed my sacrifice, and I am therefore desirous to give you a gift. Demand what it shall be."