“Then the Son of Man
Will send out
The angels.
He will gather
His elect
From the four winds,
From the ends of the earth
To the ends of heaven.”
καὶ τότε ἀποστελεῖ τοὺς ἀγγέλους καὶ ἐπισυνάξει τοὺς ἐκλεκτοὺς αὐτοῦ ἐκ τῶν τεσσάρων ἀνέμων ἀπ’ ἄκρου γῆς ἕως ἄκρου οὐρανοῦ.
This is almost word for word, in Matthew, chapter 24:31. Mark said that the Son of Man would send out angels (καὶ τότε ἀποστελεῖ τοὺς ἀγγέλους). Thus, the angels were the apostles or sent ones for gathering the chosen ones. There was no mention of a trumpet call here, as in Matthew. These angels would gather his elect or chosen ones (καὶ ἐπισυνάξει τοὺς ἐκλεκτοὺς αὐτοῦ) from the four winds (ἐκ τῶν τεσσάρων ἀνέμων), from the ends of the earth to the ends of heaven (ἀπ’ ἄκρου γῆς ἕως ἄκρου οὐρανοῦ). The Son of Man would send his apostolic angels to gather the chosen ones from all over the place.
Eugene Finnegan Bible Project 