Then he said to me: Prophesy to the breath, prophesy, son of man! Say to the breath: Thus says the Lord God: From the four winds come, O breath, and breathe into these slain that they may come to life.
He said this in reference to the Spirit that those who came to believe in him were to receive. There was, of course, no Spirit yet, because Jesus had not yet been glorified. Discussion About the Origins of the Messiah.
He said to them, “Did you receive the holy Spirit when you became believers?” They answered him, “We have never even heard that there is a holy Spirit.”
Peter [said] to them, “Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the holy Spirit.