Another voice from heaven: as the words my people clearly indicate, this is God speaking (see 16.1). So one may say “Then I heard God speak from heaven, saying….”

Come out of her: it may be better to make this more complete: “Leave the city,” “Come out of Babylon.” See the similar command in Jer 51.45.

Lest: in English, at least, it is more natural to say “so that you won’t (take part)” or “to avoid (taking part).”

Take part in her sins … share in her plagues: God’s people must leave the city in order to avoid sinning as the people of the city do. They are also to leave so that they won’t be punished as the city will be. The plagues are God’s punishment on the city (see 9.18; 15.1). So these two clauses may also be expressed as “So that you may avoid sinning as the people of Babylon do, and that God will not punish you as he will (punish) this city.”

Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on The Revelation to John. (UBS Handbook Series). New York: UBS, 1993. For this and other handbooks for translators see here .