Mahabharata Anushasna Parva Chapter 104:7

Mahabharata Anushasna Parva (Dana Dharma Parva) Chapter 104:7 Nor should one ever eat any food that has been prepared by a woman in her functional period. One should never eat any food or drink, any liquid whose essence has been taken off. Nor should one eat anything without giving a portion thereof to persons that wishfully gaze at the food that one happens to take. The man of intelligence should never sit close to one that is impure. Nor should one sit close to persons that are foremost in piety.[] All food that is forbidden in ritual acts should never be taken even on other occasions. The fruits of the Ficus religiosa and the Ficus Bengalensis as also the leaves of the Crotolaria Juncea, and the fruits of the Ficus glomerata, should never be eaten by one who is desirous of his own good. The flesh of goats, of kine, and the peacock, should never be eaten. One should also abstain from dried flesh and all flesh that is stale. The man of intelligence should never eat any salt, taking it up with his hand. Nor should he eat curds and flour of fried barley at night. One should abstain also from flesh of animals not slain in sacrifices. One should, with concentrated attention, eat once in the morning and once in the evening, abstaining entirely from all food, during the interval. One should never eat any food in which one may detect a hair. Nor should one eat at the Sraddha of an enemy. One should eat silently; one should never eat without covering one's person with an upper garment, and without sitting down.[] One should never eat any food placing it on the bare ground. One should never eat except in a sitting posture. One should never make any noise while eating.[] The man of intelligence should first offer water and then food to one that has become his guest, and after having served the guest thus, should then sit to his meals himself. He who sits down to dinner in a line with friends and himself eats any food without giving thereof to his friends, is said to eat virulent poison. As regards water and Payasa and flour of fried barley and curds and ghee and honey, one should never, after drinking or eating these, offer the remnants thereof to others. One should never, O chief of men, eat any food doubtingly.[] One desirous of food should never drink curds at the conclusion of a meal. After the meal is finished, one should wash one's mouth and face with the (right) hand only, and taking a little water should then dip the toe of the right foot in it. After washing, one should touch the crown of one's head with the (right) hand. With concentrated attention, one should next touch fire. The man who knows how to observe all these ordinances with care, succeeds in attaining to the foremost place among his kinsmen. One should, after finishing one's meals, with one's nose and eyes and ears and navel and both hands wash with water. One should not, however, keep one's hands wet.