Key Verse
And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Acts 2:4
A new heart also will I give you, and a new spirit will I put within you... And I will put my spirit within you, and cause you to walk in my statutes, and ye shall keep my judgments, and do them."
Ezekiel 36:26-27
For with stammering lips and another tongue will he speak to this people.
To whom he said, This is the rest wherewith ye may cause the weary to rest; and this is the refreshing: yet they would not hear.
Isaiah 28:11-12
And it shall come to pass afterward, that I will pour out my spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions: And also upon the servants and upon the handmaids in those days will I pour out my spirit
Joel 2:28-29