Matthew 28: 18-20 Then Jesus approached and said to them, “All power in heaven and on earth has been given to me. Go, therefore, and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, until the end of the age.”
Mark 16:15-16 Jesus said to His disciples: “Go into the whole world and proclaim the gospel to every creature. Whoever believes and is baptized will be saved; whoever does not believe will be condemned.”
(John 15:11-12) I have told you this so that my joy may be in you and your joy might be complete. This is my commandment: love one another as I love you.