Shaqiq (may Allah have mercy on him) says that once I was sitting with Sayyiduna Ibn Mas'ud and Sayyiduna Abu Musa Ash'ari (may Allah be pleased with them both). These two gentlemen said that the Messenger of Allah (peace and blessings be upon him) said: "Near the Day of Judgment, ignorance will descend, knowledge will be taken away, and 'harj' will become widespread." We asked about the meaning of 'harj', so he said: "Killing."