No one knows exactly when the Hour will begin except Allah (may He be glorified and exalted). 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 Islamic knowledge will become rare on earth, because many scholars will die. 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 among the people, and that will result in no one having fear of Allah in their hearts. Zina (unlawful sexual relationships) and shameful deeds will become widespread, as mentioned in the report of Muslim, and they will become clearly prevalent, even though Allah has forbidden them, as He says: {And do not approach unlawful sexual intercourse} [al-Isra’ 17:32]. Another of the signs that the Day of Resurrection is approaching is that the numbers of women will increase exponentially in comparison with the numbers of men, as few males will be born, whereas many females will be born, or the number of men may be reduced as a result of wars and conquests, until fifty women will only be able to find one man to be in charge of them, sponsor them and look after their affairs. It is as if these five things are singled out for mention because they indicate that matters are getting out of hand, which if they are brought under control, will be a cause of well-being in this world and the hereafter. The first is religion, because the taking away of knowledge will undermine religion. The second is reason, because it is undermined by consuming intoxicants. The third is lineage, because it is undermined by zina. As for life and wealth, they will be undermined too, because of overwhelming trials and tribulations, and when all of these things are undermined, this indicates that the world is heading towards ruin. 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. In this hadith, 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), as he foretold what will happen at the end of time..