Final answer:
God promised to pour out His Spirit on the Apostles during Pentecost, an event that is commemorated fifty days after Easter and signifies the inclusiveness of God's grace to all believers.
Step-by-step explanation:
According to the biblical account in Acts 2, God promised to pour out His Spirit during Pentecost, which is the event representing the descent of the Holy Spirit on the Apostles. This event is significant in Christianity and is commemorated fifty days after Pascha (Easter).
The Holy Spirit inspired the Apostles to preach the crucified and risen Christ in different languages to people of various tribes and tongues.
This scriptural promise indicates the inclusiveness of God's grace, extending the divine presence and inspiration to all believers, symbolized through the Apostles' ability to communicate across cultural and linguistic barriers.
In the broader religious context, notions of divine favor, as in the descent of the Holy Spirit, reflect the theology that God is sovereign and has the authority to forgive and even impart spiritual gifts, like the ability to prophesy or speak in tongues.
This theological view acknowledges both the mercy and judgment of God, as suggested in other religious scripts, showing that God acts according to divine wisdom and sovereignty over all creation.
Artistic representations of Pentecost often feature the Apostles along with flames descending upon them, sometimes including the Virin Mary, to depict this pouring out of the Spirit. However, such depictions are interpretations since the scriptural narrative specifically mentions the Apostles as the recipients of the Holy Spirit.