I heard the truthful and trusted by Allah (i.e., the Prophet (ﷺ) ) saying, "The destruction of my followers will be through the hands of young men from Quraish."
Sahih al-Bukhari Book 92, Hadith 10
← Previous Hadith A man came to the Prophet (ﷺ) and said, "O Allah's Messenger (ﷺ)! You appointed such-and-such person and you did not appoint me?" The Prophet (ﷺ) said, "After me you will see rulers not giving you your right (but you should give them their right) and be patient till you meet me."

Sahih al-Bukhari Book 92, Hadith 9 Next Hadith → The Prophet (ﷺ) got up from his sleep with a flushed red face and said, "None has the right to be worshipped but Allah. Woe to the Arabs, from the Great evil that is nearly approaching them. Today a gap has been made in the wall of Gog and Magog like this." (Sufyan illustrated by this forming the number 90 or 100 with his fingers.) It was asked, "Shall we be destroyed though there are righteous people among us?" The Prophet (ﷺ) said, "Yes, if evil increased."

Sahih al-Bukhari Book 92, Hadith 11