Mbh 11.1.7b

Every person should, at the outset, adopt such a beneficial line of action that he may not have, in the end, to repent for something already done by him. Through affection for thy son, O monarch, thou didst what was agreeable to Duryodhana. Thou art obliged to repent for that now. It behoveth thee, however not to give way to grief. The man whose eyes are directed towards only the honey without being once directed to the fall, meets with destruction through his covetousness for honey. Such a man is obliged to repent even like thee. The man who indulges in grief never wins wealth. By grieving one loses the fruits one desires. Grief is again an obstacle to the acquisition of objects dear to us. The man who gives way to grief loses even his salvation. The man who shrouds a burning coal within the folds of his attire and is burnt by the fire that is kindled by it, would be pronounced a fool if he grieves for his injuries. Thyself, with thy son, hadst, with your words, fanned the Partha-fire, and with your covetousness acting as clarified butter caused that fire to blaze forth, into consuming flames. When that fire thus blazed forth thy sons fell into it like insects. It behoveth thee not, however, to grieve for them now that they have all been burnt in the fire of the enemy's arrow. The tear-stained face, O king, which thou bearest now is not approved by the scriptures or praised by the wise. These tears, like sparks of fire, burn the dead for whom they are shed. Kill thy grief with thy intelligence, and bear thyself up with the strength of thy own self!' Thus was the king comforted by the high-souled Sanjaya. Vidura then, O scorcher of foes, once again addressed the king, displaying great intelligence."