​But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in JerUSAlem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.  - Acts 1:8

And he said unto them, Go ye into all the world, and preach the gospel to every creature.  - Mark 16:15

Declare his glory among the heathen, his wonders among all people.  - Psalms 96:3

For so hath the Lord commanded us, saying, I have set thee to be a light of the Gentiles, that thou shouldest be for salvation unto the ends of the earth.  - Acts 13:47

And the gospel must first be published among all nations. 
- Mark 13:10