Mahabharata 5.44.12

5.44.12

evaṃ vasantaṃ yadupaplaveddhanamācāryāya tadanuprayacchet |
satāṃ vṛttiṃ bahuguṇāmevameti guroḥ putre bhavati ca vṛttireṣā || 12 ||

This is regarded as the second step of Brahmacharya. He should behave towards his preceptor's wife and son also in the same way as towards his preceptor himself. This also is regarded as the second step of Brahmacharya. Bearing well in mind what has been done to him by the preceptor, and understanding also its object, the disciple should, with a delighted heart think,--I have been taught and made great by him. This is the third step of Brahmacharya. Without requiring the preceptor by payment of the final gift, a wise disciple must not betake to another mode of life; nor should he say or even think of in his mind,--I make this gift. This is the fourth step of Brahmacharya. He attaineth the first step of (knowledge of Brahman which is) the object of Brahmacharya by aid of time; the second step, through the preceptor's prelections; the third, by the power of his own understanding; and finally, the fourth, by discussion. The learned have said that Brahmacharya is constituted by the twelve virtues, the Yoga-practices are called its Angas, and perseverance in Yoga-meditation called is its Valam and one is crowned with success in this in consequence of the preceptor's aid and the understanding of the sense of the Vedas. Whatever wealth a disciple, thus engaged, may earn, should all be given to the preceptor. It is thus that the preceptor obtaineth his highly praise-worthy livelihood. And thus also should the disciple behave towards the preceptor's son.