Compare Isaiah 66:20 and 1 Enoch 57:1

... Different from 56:5-8, which is given as a straightforward prediction, the contents of these verses are recounted as something that Enoch “saw” (verse 1). Unfortunately, there is no account of an interpreting angel explaining the less-than-clear vision, and we are left to choose among three possible interpretations of the chapter. (1) A majority of commentators see here a description of the return of the Israelite dispersion. (2) A few others understand it to refer to the arrival of another hostile army. (3) This may reflect prophetic predictions that the gentiles will flow to Jerusalem to pay tribute to the God of Israel. That the people riding in a host of chariots represent the returning Israelite dispersion is taken for granted by commentators who espouse the first interpretation. This is understandable, since such a return is a common topic in biblical and in later Jewish literature and this time. See, for example, Isaiah 27:12-13; 49:12; 60:4-9; 66:19-20; Zechariah 8:7-8; Tobit 13:9-18; 14:5; Baruch 4:21-5:9; Psalms of Solomon 8:28 (34); 11; 4 Ezra 13:39-50. ...