“Go, therefore 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”
(Mt 28:19-20).
“You are witnesses of these things” (Lk 24:48);
“But you shall receive power when the Holy Spirit has come upon you, and you shall be my witnesses… to the end of the earth” (Acts 1:8).