Ref. No. 2786/45-4342
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
Kufr will be applied to the one who utters the words of Kufr from the tongue; in fact, it is not possible to know what is in the heart of the speaker, so the focal point of Kufr will be on the pronunciation of Kufr words. Therefore, unless the person repents, he will not be treated like a Muslim. He is obliged to go through the repentance and renewal of faith along with the renewal of the marriage if he is married.
And Allah knows best
Darul Ifta
Darul Uloom Waqf Deoband
