The ruling on dhikr with the heart without the tongue and reciting on behalf of one's children

Question:
The questioner says: Is it sufficient to recite the daily portion and the adhkar with the heart without moving the lips, or is it obligatory to use the limbs? And is it sufficient to recite for myself and my sons, or must I allocate a separate recitation for them?

Answer:
Dhikr with the heart alone is not sufficient. It is necessary for one who is able to speak to perform dhikr with both the heart and the tongue. He must speak, uttering the dhikr of Allah (Mighty and Majestic), the supplications, and the prescribed daily portions with his tongue. He must utter them with his tongue and must believe in them with his heart. Therefore, utterance without the intention of the heart is not sufficient, and the intention of the heart without utterance is not sufficient. Rather, both are necessary. It is not called dhikr unless it is spoken and heard.
As for the daily portion for the children: should it be recited for them separately, or together with his own portion? Yes, he intends with the daily portion that it is for himself and for his children, and this is sufficient. He intends with the daily portion that it is for himself and for his children, and he utters it, mentioning his children or whoever he wishes along with himself. It is not required that he recite for himself first and then recite for his children. Rather, he utters it and intends it with his heart for himself and for whoever he wishes among his children or others. Yes.