What is the ruling on a person entering the mosque following a ma'mum who is making up the part of the prayer he missed after the imam's taslim?

The questioner : ... Some people, when they enter the mosque and are masbuq, and the imam has finished the prayer, some of the masbuq people enter, and another masbuq person enters and follows the first masbuq person. What is the ruling on this action?

The Shaykh : The ruling on this is like that of the Sunnah congregation, meaning like the congregation for the Sunnah prayer.

The questioner : Do we invalidate the prayer, O Shaykh?

The Shaykh : No, we do not invalidate it; but we do not draw near to Allah with it.