Jesus gives the Great Commission...
Matthew 28:16 ... But the eleven disciples went into Galilee, to the mountain where Jesus had sent them. 17 When they saw him, they bowed down to him, but some doubted. 18 Jesus came to them and spoke to them, saying, All authority has been given to me in heaven and on earth. 19 Go, and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 teaching them to observe all things that I commanded you. Behold, I am with you always, even to the end of the age. Amen.
Mark 16:15 He said to them, Go into all the world, and preach the Good News to the whole creation. 16 He who believes and is baptized will be saved; but he who disbelieves will be condemned. 17 These signs will accompany those who believe: in my name they will cast out demons; they will speak with new languages; 18 they will take up serpents; and if they drink any deadly thing, it will in no way hurt them; they will lay hands on the sick, and they will recover.
19 So then the Lord, after he had spoken to them, was received up into heaven, and sat down at the right hand of God. 20 They went out, and preached everywhere, the Lord working with them, and confirming the word by the signs that followed. Amen.