How is a voluntary prayer cut off when the iqamah is called?

Question:
The questioner for the program says: If the iqamah is called for the obligatory prayer while I am praying a voluntary prayer, do I cut off the voluntary prayer with a taslim, or without a taslim?

Answer:
You do not need a taslim; you simply cut it off. This is based on the saying of the Prophet (peace and blessings be upon him): narrated by Muslim in the Sahih. This is what the Prophet (peace and blessings be upon him) said. So, when the iqamah is called, the prayer you are in becomes invalid, and you must join the imam, unless you are in the final part, in prostration or the tashahhud, in which case you complete it because it has ended. However, if you still have a rak'ah remaining, cut it off with your intention, and that is sufficient.