'Holy Spirit' in the Bible

I have baptized you with water, but he will baptize you with the Holy Spirit."

but whoever slanders the Holy Spirit remains unforgiven to the end; he has to answer for an enduring sin."

David said himself, speaking under the inspiration of the Holy Spirit-- 'The Lord said to my lord: "Sit at my right hand, Until I put thy enemies beneath thy feet.'"

Whenever they betray you and hand you over for trial, do not be anxious beforehand as to what you shall say, but say whatever is given you at the moment; for it will not be you who speak, but the Holy Spirit.