The book of Revelation is the great culmination of the missionary mandate. In this book, we clearly see the harvest of souls all in one place. At the same time, we witness the consequences for all those who rejected the Gospel.
Revelation 5:9 (NKJV And have redeemed us to God by Your blood out of every tribe and tongue and people and nation,
Revelation 7:9 (NKJV) After these things I looked, and behold, a great multitude which no one could number, of all nations, tribes, peoples, and tongues, standing before the throne and before the Lamb, clothed with white robes, with palm branches in their hands,
Revelation 14:6 “The angel had the eternal Gospel to proclaim to those who live on the earth, to every nation, tribe, language, and people.”
Revelation 15:4 “All the nations will come and worship before you.”
Revelation 21:23-24 “The Lamb is its lamp. The nations will walk by its light.”