Scripture reference
Acts 2:1-13
Fifty days after the Resurrection, the Holy Spirit descends upon the Blessed Virgin Mary and the apostles gathered in prayer. Filled with divine fire, they are strengthened to proclaim Christ to the nations. "And there appeared to them parted tongues as it were of fire, and it sat upon every one of them: and they were all filled with the Holy Spirit." (Acts 2:3-4)