Mark 13:27

And then he shall send his angels
The ministers of the Gospel to preach it, and plant more churches among the Gentiles, since that at Jerusalem was entirely broken up:

and shall gather together his elect;
that is, he the son of man, or Christ, shall gather them by the ministry of his servants; or "they shall gather them", as the Ethiopic version reads; and as Beza says it is read in a certain copy: these ministers shall be the means of gathering such whom God has chosen from all eternity, to obtain salvation by Christ, out of the world, and unto Christ, and into a Gospel church state: even

from the uttermost part of the earth, to the uttermost part of the
heaven;
be they where they will, on earth, and under the whole heavens; (See Gill on Matthew 24:31).