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"And (remember) when you said to him (Zaid bin Harithah radhiAllaahu'anhu the freed-slave of the Prophet SAW) on whom Allaah has bestowed Grace (by guiding him to Islaam) and you (O Muhammad sal-Allaahu 'alayhe wa sallam too) have done favour (by manumitting him) "Keep your wife to yourself, and fear Allaah." But you did hide in yourself (i.e, what Allaah has already made known to you that He will give her to you in marriage) that which Allaah will make manifest, you did fear the people (i.e., Muhammad sal-Allaahu 'alayhe wa sallam married the divorced wife of his manumitted slave) whereas Allaah had a better right that you should fear Him, So when Zaid had accomplished his desire from her (i.e, divorced her), We gave her to you in marriage, so that (in future) there may be no difficulty to the believers in respect of (the marriage of) the wives of their adopted sons when the latter have no desire to keep them (i.e, they have divorced them), And Allaah's Command must be fulfilled." [Al-Ahzaab (33):37]

Narrated Anas:

Allah's Apostle said, "From among the portents of the Hour are (the following):

1. Religious knowledge will be taken away (by the death of Religious learned men).
2. (Religious) ignorance will prevail.
3. Drinking of Alcoholic drinks (will be very common).
4. There will be prevalence of open illegal sexual intercourse.

[The Book of Knowledge Volume 1, Book 3, Hadeeth 80]