Sayyiduna Anas bin Malik (may Allah be pleased with him) narrated that the Companions passed by a funeral and the people began to praise (the deceased, saying what a good man he was). Upon hearing this, the Messenger of Allah (peace and blessings be upon him) said: "It has become obligatory." Then they passed by another funeral and the people began to speak ill of him. The Noble Prophet (peace and blessings be upon him) again said: "It has become obligatory." Upon this, Sayyiduna Umar bin Khattab (may Allah be pleased with him) asked: "What has become obligatory?" The Messenger of Allah (peace and blessings be upon him) replied: "For the one whom you praised, Paradise has become obligatory for him, and for the one whom you spoke ill of, Hell has become obligatory for him. You are Allah’s witnesses on earth."