Final answer:
The correct answer is the Holy Spirit and Pentecost, as it signifies the event when the Holy Spirit was sent to the Apostles in Jerusalem fifty days after Easter.
Step-by-step explanation:
Peter also stated that the Lord Jesus had received the gift of the Holy Spirit from God the Father and sent him to the believers in Jerusalem on the feast day called Pentecost. Peter stated that the Lord Jesus had received the gift of the Holy Spirit from God the Father and sent him to the believers in Jerusalem on the feast day called Pentecost.
The event of Pentecost, which occurs fifty days after Easter, describes the descent of the Holy Spirit on the Apostles. This significant day in Christian history involved the Apostles being inspired to preach in different languages to ensure that people of all tribes and languages could understand the message of the crucified and risen Christ, as narrated in the Acts of the Apostles.