Mbh 13.104.2o

Sleep at day-time shortens life. To sleep after the sun has risen shortens life. They who sleep at any of the twilights, or at nightfall or who go to sleep in a state of impurity, have their lives shortened. Adultery always shortens life. One should not remain in a state of impurity after shaving.[483] One should, O Bharata, carefully abstain from studying or reciting the Vedas, and eating, and bathing, at eventide. When the evening twilight comes, one should collect one's senses for meditation, without doing any act. One should, O king, bathe and then worship the Brahmanas. Indeed, one should bathe before worshipping the deities and reverentially saluting the preceptor. One should never go to a sacrifice unless invited. Indeed, one may go there without an invitation if one wishes only to see how the sacrifice is conducted. If one goes to a sacrifice (for any other purpose) without an invitation and if one does not, on that account, receive proper worship from the sacrificer, one's life becomes shortened. One should never go alone on a journey to foreign parts. Nor should one ever proceed alone to any place at night. Before evening comes, one should come back to one's house and remain within it. One should always obey the commands of one's mother and father and preceptor, without at all judging whether those commands are beneficial or otherwise. One should, O king, attend with great care to the Vedas and the science of arms. Do then, O king, carefully attend to the practice of riding an elephant, a steed, and a war-chariot. The man who attends to these with care succeeds in attaining to happiness. Such a king succeeds in becoming unconquerable by foes, and sway his servants and kinsmen without any of them being able to get the better of him. The king that attains to such a position and that carefully attends to the duty of protecting his subjects, has never to incur any loss.