In The Bible, Jesus Christ our Lord after His resurrection said this to His disciples in Mat 28:18 to 20, "All authority in heaven and on earth has been given to me. Therefore (1.), go and (2.), make disciples of all nations, (3.), baptizing them in the name of the Father and of the Son and of the Holy Spirit, and (4.), teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age."

Go ye into all the world, and preach the gospel to every creature.  Mark 16:15b

Therefore said He unto them, The harvest truly is great, but the labourers are few: pray ye therefore the Lord of the harvest, that He would send forth labourers into His harvest.  Luke 10:2

For God so loved the world, that He gave His only begotten Son, that whosoever believeth in Him should not perish, but have everlasting life.  John 3:16

Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.  John 4:35

Apostle Paul said "Now then we are ambassadors for Christ.  2 Corinthians 5:20a

Apostle John said:And we have seen and do testify that the Father sent the Son to be the Saviour of the world.  1 John 4:14