Is it obligatory to move the lips when reciting the Qur'an and dhikr inside and outside the prayer?

Question:
He says: Honorable Shaykh, may Allah grant you success. Regarding the recitation of the Qur'an and dhikr inside and outside the prayer, is it obligatory to move one's lips, or is it sufficient to have the dhikr in the heart and look only?

Answer:
No, it is not permissible; that is not sufficient. One must speak; it is necessary to speak so that one hears oneself, so that one hears oneself and moves one's lips. Merely having it present in the heart is not sufficient, whether it is recitation in the prayer, or dhikr, or tasbih, or ruku' or sujud. This in the heart is not sufficient; the prayer is not valid with this. Yes.