In Christianity, the Great Commission is the instruction of the resurrected Jesus Christ to his disciples to spread the gospel to all the nations of the world. The most famous version of the Great Commission is in Matthew 28:16–20, where on a mountain in Galilee Jesus calls on his followers to make disciples of and baptize all nations in the name of the Father, the Son, and the Holy Spirit.

The Great Commission, therefore, is usually interpreted to mean spreading the Christian message and converting others to Christianity. The Gospel of Matthew does not specifically use such a term. In fact, the phrase "Great Commission" does not appear until late in Christian history. Some scholars argue that it was coined by Baron Justinian von Welz, a 17th-century Lutheran nobleman, who argued that the words in Matthew 28 meant that all Christians were required to spread the faith, not just Jesus' closest disciples.

The Day of Pentecost (4:37)
Scripture References: Matthew 28:16-20, Mark 16:15-20, or Luke 24:50-53
https://www.youtube.com/watch?v=PLa-lj0zCGg