Mbh 5.38.1a

“Vidura said, ‘The heart of a young man, when an aged and venerable person cometh to his house (as a guest), soareth aloft. By advancing forward and saluting him, he getteth it back. He that is self-controlled, first offering a seat, and bringing water and causing his guest’s feet to be washed and making the usual enquiries of welcome, should then speak of his own affairs, and taking everything into consideration, offer him food. The wise have said that man liveth in vain in whose dwelling a Brahmana conversant with mantras doth not accept water, honey and curds, and kine from fear of being unable to appropriate them, or from miserliness and unwillingness with which the gifts are made. A physician, a maker of arrows, even one that hath given up the vow of Brahmacharya before it is complete, a thief, a crooked-minded man, a Brahmana that drinks, one that causeth miscarriage, one that liveth by serving in the army, and one that selleth the Vedas, when arrived as a guest, however undeserving he may be the offer of water should be regarded (by a householder) as exceedingly dear. A Brahmana should never be a seller of salt, of cooked food, curds, milk, honey, oil, clarified butter, sesame, meat, fruits, roots, potherbs, dyed clothes, all kinds of perfumery, and treacle. He that never giveth way to anger, he that is above grief, he that is no longer in need of friendship and quarrels, he that disregardeth both praise and blame, and he that standeth aloof from both what is agreeable and disagreeable, like one perfectly withdrawn from the world, is a real Yogin of the Bhikshu order. That virtuous ascetic who liveth on rice growing wild, or roots, or potherbs, who hath his soul under control, who carefully keepeth his fire for worship, and dwelling in the woods is always regardful of guests, is indeed, the foremost of his brotherhood. Having wronged an intelligent person, one should never gather assurance from the fact that one liveth at a distance from the person wronged.