Mbh 13.104.2l

Listen to me, O thou of Kuru's race, as I tell thee what purification is cleansing and beneficial for a Brahmana. Before beginning to eat and after finishing the meal, and in all acts requiring purification, the Brahmana should perform the achamana with water placed on the limb called the Brahmatirtha.[477] After ejecting any matter from the throat or spitting, one should wash one's mouth before one can become pure. A kinsman who happens to be old, or a friend who happens to be poor, should be established in one's house and his comforts looked after as if he were a member of the family. By doing this, one succeeds in acquiring both fame and long life. The establishment of pigeons in one's house is fraught with blessedness, as also of parrots both male and female. If female these taken to one's abode, they succeed in dispelling calamity. The same is the case with cockroaches, If fireflies and vultures and wood-pigeons and bees enter a house or seek residence in it, acts of propitiating the deities should be performed. These are creatures of evil omen, as also ospreys. One should never divulge the secrets of high-souled men; one should never have sexual congress with a forbidden woman. Nor should one ever have such congress with the spouse of a king or with women that are the friends of queens. One should never cultivate intimacy with physicians, or with children, or with persons that are old, or with one's servants, O Yudhishthira. One should always provide for friends, for Brahmanas, and for such as seek one's protection. By doing this, O king, one acquires a long life. The man of wisdom should reside in such a house as has been constructed with the aid of a Brahmana and an engineer skilled in his profession, if indeed, O king, he desires his own good.[478] One should not, O king, sleep at the evening twilight. Nor should one study at such an hour for acquiring any branch of knowledge. The man of intelligence should never eat also at such an hour.