جامع الترمذي

Narrated Jubair bin Nufair: from Abu Ad-Darda who said: "We were with the Prophet (ﷺ) when he raised his sight to the sky, then he said: 'This is the time when knowledge is to be taken from the people, until what remains of it shall not amount to anything." So Ziyad bin Labid Al-Ansari said: 'How will it be taken from us while we recite the Qur'an. By Allah we recite it, and our women and children recite it?' He (ﷺ) said: 'May you be bereaved of your mother O Ziyad! I used to consider you among the Fuqaha of the people of Al-Madinah. The Tawrah and Injil are with the Jews and Christians, but what do they avail of them?'" Jubair said: "So I met 'Ubadah bin As-Samit and said to him: 'Have you not heard what your brother Abu Ad-Darda said?' Then I informed him of what Abu Ad-Darda said. He said: 'Abu Ad-Darda spoke the truth. If you wish, we shall narrated to you about the first knowledge to be removed from the people: It is Khushu', soon you will enter the congregational Masjid, but not see any man in it with Khushu'.'"