Vishnupurana 3.12.39

3.12.39

nordhvaṃ na tiryagdūraṃ vā na paśyanparyaṭedbudhaḥ /
yugamātraṃ mahīṣṭaṣṭhaṃ naro gacchedvilokayan //

"On the days called Parvas, on periods of impurity, upon unseasonable thunder, and the occurrence of eclipses or atmospheric portents, a wise man must desist from the study of the Vedas. The pious man who suppresses anger and envy, who is benevolent to all, and allays the fears of others, secures, as the least of his rewards, enjoyment in Swarga. A man should carry an umbrella, as a defence against sun and rain; he should bear a staff when he goes by night, or through a wood; and he should walk in shoes, if he desires to keep his body from harm. As he goes along he should not look up, nor about him, nor afar off, but keep his eyes upon the ground to the extent of a couple of yards.