If the iqamah is called while he is in a voluntary prayer that he has not completed

Question:
Honorable Shaykh, may Allah grant you success. If a man prays one rak'ah of the rawatib or of a voluntary prayer, and then the iqamah is called, so he does not complete this voluntary prayer and leaves it to go to the obligatory prayer, his question is: Is this rawatib prayer recorded for him, or does he repeat it after the prayer?

Answer:
It is not recorded for him, and he does not repeat it. There is no prayer after the iqamah except the obligatory prayer, so the rak'ah is not recorded for him, and he does not repeat it. It is considered that he exited it and it ended, and he acted according to the hadith. The result is that when the iqamah is called, one does not enter into a voluntary prayer.
One does not enter into a voluntary prayer, and it is not prescribed to do so; this is by consensus. As for if the iqamah is called while he is in it, it was said that he should complete it briefly, he should complete it briefly, and it was said that he should cut it off and not complete it, according to this opinion if the iqamah is called while he is in it. And perhaps the best, as you heard from Shaykh Ibn Baz (may Allah have mercy on him), is that if he is at the beginning of it, he cuts it off, and if he is at the end of it, he completes it. This is the best.