How then shall they call on him in whom they have not believed? and…

Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: Teaching them to observe all things whatsoever I have commanded you. (Matthew 28:19-20)

Matthew 28:19 (KJV)

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

Mark 16:15 (KJV)

Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine. (2 Timothy 4:2)

2 Timothy 4:2 (KJV)

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)

Acts 1:8 (KJV)

But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear. (1 Peter 3:15)

1 Peter 3:15 (KJV)

Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God. (2 Corinthians 5:20)

2 Corinthians 5:20 (KJV)