And when the day of Pentecost was fully come, they were all with one accord in one place.
Acts 2:4And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Romans 8:26Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.
1 Corinthians 13:1Though I speak with the tongues of men and of angels, and have not charity, I am become as sounding brass, or a tinkling cymbal.
1 Corinthians 14:1Follow after charity, and desire spiritual gifts, but rather that ye may prophesy.
1 Corinthians 14:2For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.