Al-Nawawi (may Allah have mercy on him) mentioned regarding recitation that it is necessary to move the lips and tongue, and that the recitation of one who recites only with his heart is not valid, and

The questioner : Okay, Shaykh, another question. Al-Nawawi (may Allah have mercy on him) mentioned regarding recitation that it is necessary to move the lips and tongue, and that the recitation of one who recites only with his heart is not valid, and according to the view that al-Fatihah is a pillar of the prayer, his prayer is invalid.

The Shaykh : The correct view

The questioner : It is correct; it is necessary for him to move them

The Shaykh : Yes, indeed