Is disbelief in the heart only, or does it occur in the heart, the tongue, and the action?

Khalid al-Anbari: Based on that, I direct my question to you: Is disbelief in the heart only, or does it occur in the heart, the tongue, and the action? In other words: Is disbelief in belief only, or does it occur in belief, speech, and action? Inform us with knowledge, may Allah reward you?

The Shaykh : What I understand in this matter is that the original basis is disbelief in the heart, but there are words and actions that may issue from a person that indicate what has settled in his heart of disbelief. However, we do not see a necessity to combine that he disbelieves with his heart and with something of his action; they may coincide or they may differ. In the sense that it is not true of the hypocrite that he disbelieved with his heart and his action; for by his action he is a Muslim. And therefore, the Qur'an came explicitly in this regard regarding the Bedouins. So what appears to me is that there is no necessity to reconcile, let alone to question: Is disbelief in the heart and the action? It may be so, but it is not required that the action be accompanied by the disbelief of the heart; because the original basis is the disbelief of the heart. So I do not know if there is something that has become clear to me so that I would appreciate such a question.
Khalid al-Anbari: Yes.