Should I complete the prayer or leave it if I have performed a rak'ah in the regular voluntary prayer (Sunnah Rawatib) and then hear the iqamah?

Question:
The last question says: If I have performed a rak'ah in the regular voluntary prayer (Sunnah Rawatib) and then hear the iqamah, is the Sunnah here to complete the prayer or to leave it? Please advise us, and may Allah reward you.

Answer:
If the iqamah is called and you are in a voluntary prayer, you must cut it off, even if you have already prayed a rak'ah, based on the saying of the Prophet (peace and blessings be upon him) So if the iqamah is called, you leave it, except for the Fajr Sunnah, which you pray after the obligatory prayer if you were sleeping. However, if you have already bowed in the second rak'ah and only a very small amount remains, you complete the prayer. If only a part remains that is not called a prayer, since the minimum for a prayer is two rak'ahs, then if the iqamah is called and you are sitting after the second rak'ah, complete it and then leave the prayer. But if you have only performed one rak'ah, or are in the first or second rak'ah before bowing, the apparent meaning of the hadith is the prohibition of completing it, based on his saying and leaving it, as a single rak'ah is called a prayer. May Allah guide everyone and keep everyone firm on the right path, and may Allah send prayers and peace upon our Prophet Muhammad and upon his family and his Companions.