Mahabharata Anushasna Parva Chapter 104:3

Mahabharata Anushasna Parva (Dana Dharma Parva) Chapter 104:3 One should never accept a gift from a person that is low and vulgar. One should never utter such words as trouble other people or as are inauspicious or are as sinful. Wordy shafts fall from the mouth. Pierced therewith, the victim grieves day and night. The man of wisdom should never shoot them for piercing the vitals of other people. A forest, pierced with shafts or cut down with the axe, grows again. The man, however, that is pierced with words unwisely spoken, becomes the victim of wounds that fester and lead to death.[] Barbed arrows and Nalikas and broadheaded shafts are capable of being extracted from the body. Wordy shafts, however, are incapable of being extracted, for they lie embedded in the very heart. One should not taunt a person that is defective of a limb or that has a limb in excess, or one that is destitute of learning, or one that is miserable, or one that is ugly or poor, or one that is destitute of strength. One should avoid atheism, calumniating the Vedas, censuring the deities, malice, pride, arrogance, and harshness. One should not, in wrath, take up the rod of chastisement for laying it upon another. Only the son or the pupil, it has been said, can be mildly chastised for purposes of instruction. One should not speak ill of Brahmanas; nor should he point at the stars with one's fingers. If asked, one should not say what the lunation is on a particular day. By telling it, one's life becomes shortened. Having answered calls of nature or having walked over a road, one should wash one's feet. One should also wash one's feet before sitting to recite the Vedas or to eat any food. These are the three things which are regarded as pure and sacred by the deities and as such fit for the Brahmana's use, viz., that whose impurity is unknown, that which has been washed in water, and that which has been well-spoken of. Samyava, Krisara, meat, Sashakuli and Payasa should never be cooked for one's own self. Whenever cooked, these should be offered to the deities.[] One should attend every day to one's fire. One should every day give alms. One should, restraining speech the while, clean one's teeth with the tooth-stick. One should never be in bed when the sun is up. If one fails any day to be up with the sun, one should then perform an expiation. Rising from bed, one should first salute one's parents, and preceptors, or other seniors deserving of respect. By so doing one attains to long life. The tooth-stick should be cast off when done with, and a new one should be used every day. One should eat only such food as is not forbidden in the scriptures, abstaining from food of every kind on days of the new moon and the full moon. One should, with senses restrained, answer calls of nature, facing the north. One should not worship the deities without having first washed one's teeth.