"Allah will not retract this knowledge by a withdrawal, [suddenly] withdrawing it from people's hearts, but He will retract knowledge by retracting the scholars, until, when He has left no scholar, people will take ignorant leaders, who will be asked, and will pronounce verdicts without knowledge, thus going astray and leading others astray." [Bukhari, Muslim]
"Indeed, among the signs of the Hour are that knowledge be sought with the petty ones." [Tabarani]
"What will be your situation when tribulation envelops you, in which a youngster will grow and the older one will become aged, and [the tribulation] will be taken as sunnah, such that if it is changed one day, it will be said, ‘This is wrong!’" Someone asked, "When is that?" He said, "When your trustworthy ones are few, and your leaders are many; when your jurists are few and your reciters are many, and knowledge is acquired for other than [the sake of] religion, and the world is sought through the deeds of the Hereafter." [Darimi, al-Hakim]
"This is [almost] the time when knowledge will be snatched from people, such that they will not be capable of [practising] any of it." [Tirmidhi (hasan gharib), al-Hakim, Darimi]
"Verily, you shall surely follow the pattern of those who were before you, span by span and cubit by cubit, to the extent that if they entered a lizard’s hole, you would follow them." [Bukhari, Muslim, Ahmad]
On the authority of Abu Hurayrah : While the Messenger of Allah D was talking, a Bedouin came and asked, "When is the Hour?" [The Prophet (may Allah bless him and his Household and grant them peace)] replied, "When trust is lost then await the Hour." [The Bedouin] asked, "How will its loss occur?" He replied, "When affairs are rested with those unworthy of [handling] them, then await the Hour." [Bukhari]
"There shall come upon people deceptive years, in which the liar will be regarded as truthful, the truthful one will be regarded as a liar, the treacherous one will be trusted, the trustworthy one will be mistrusted, and in which al-Ruwaybidah will speak." Someone asked, "What is al-Ruwaybidah?" He said, "A paltry man speaking about the affair/business of the general public." [Ahmad, Ibn Majah, al-Hakim]
"By He in Whose hand is my soul! The world shall not pass [away] before there comes upon people a day in which the murderer will not know why he has murdered, nor will the murdered one know why he has been killed." [Muslim]
"Time will contract (i.e. it will appear to be shorter, and its blessings will vanish, such that people will accomplish less in more time), knowledge will be lifted up, stinginess will be cast [into people’s hearts], tribulations will appear, and killing will be much." [Ahmad, Bukhari, Muslim, Abu Dawud]
"Make haste to do [good] deeds before six [things] :
[1] the leadership of fools,
[2] the proliferation of police / government agents,
[3] the selling of judgement,
[4] blood being taken lightly,
[5] severance of [ties of] kinship,
[6] people who will take the Qur’an as music, sending ahead one of them to sing for them, even though he may be least of them in knowledge/understanding [of the religion]." [Ahmad, Tabarani]