Sunan Ibn Majah, Chapter: The Chapters on Tribulations

"The Prophet (saw) mentioned something and said: 'That will be at the time when knowledge (of Quran) disappears.' I said: 'O Messenger of Allah, how will knowledge disappear when we read the Quran and teach it to our children, until the Day of Resurrection?' He said: 'May your mother be bereft of you, Ziyad! I thought that you were the wisest man in Al- Madinah. Is it not the case that these Jews and Christians read the Tawrah and the Injil, but they do not act upon anything of what is in them?'"