No one knows exactly when the Hour will begin except Allah (may He be glorified and exalted), for He has kept that knowledge to Himself. Nevertheless, He has ordained some signs of its approach, to alert the Muslim so that he may strive to prepare for that momentous Day. In this hadith, the Prophet (blessings and peace of Allah be upon him) tells us that one of the signs of the approach of the Hour is that beneficial knowledge that is accompanied by righteous deeds will be taken away, and will disappear from the earth with the death of its people. It will be reduced by their death but will not be erased from people’s hearts. Then the people will follow ignorant leaders who will speak about religious issues on the basis of their own personal views, and they will issue fatwas that are based on ignorance. Thus ignorance will prevail and spread among the people, and tribulations, disputes and division will become widespread; that will result in no one having fear of Allah in their hearts, and there will be a great deal of “harj.” When the people asked what harj meant, the Prophet (blessings and peace of Allah be upon him) made a gesture with his hand, from which it could be understood that the word referred to killing and unlawful bloodshed. This explanation is clearly mentioned in al-Sahihayn, where it says: They said: O Messenger of Allah, what is that? He said: “Killing, killing.” What is meant is that there would be tribulations and disputes, and that will be the cause of a great deal of killing among the Muslims, as is mentioned in a report narrated by Ibn Majah from Abu Musa al-Ash‘ari (may Allah be pleased with him), in which it says that the Prophet (blessings and peace of Allah be upon him) said: “It will not be as a result of the polytheists killing the Muslims; rather you will kill one another, to the extent that a man will kill his neighbour, his cousin and his relative.” This hadith indicates that Allah (may He be exalted) has already decreed that the ruin of life on earth will come once mischief and corruption become prevalent and widespread. It also indicates that we are urged to acquire knowledge, for it will not be taken away except through the death of knowledgeable people. This hadith is one of the signs of the prophethood of the Prophet (blessings and peace of Allah be upon him)..