The Sign of the Covenant
Genesis 17 
”When Abram was ninety-nine years old, the Lord appeared to Abram and said to him, “I am Almighty God; walk before Me and be blameless. And I will make My covenant between Me and you, and will multiply you exceedingly.”  Then Abram fell on his face, and God talked with him, saying:  “As for Me, behold, My covenant is with you, and you shall be a father of many nations.  No longer shall your name be called Abram, but your name shall be Abraham; for I have made you a father of many nations.  I will make you exceedingly fruitful; and I will make nations of you, and kings shall come from you. And I will establish My covenant between Me and you and your descendants after you in their generations, for an everlasting covenant, to be God to you and your descendants after you. Also I give to you and your descendants after you the land in[f] which you are a stranger, all the land of Canaan, as an everlasting possession; and I will be their God.”

God’s Spirit Poured Out
Joel 2:28-32 
“And it shall come to pass afterward
That I will pour out My Spirit on all flesh;
Your sons and your daughters shall prophesy,
Your old men shall dream dreams,
Your young men shall see visions.
 And also on My menservants and on My maidservants I will pour out My Spirit in those days. “And I will show wonders in the heavens and in the earth:Blood and fire and pillars of smoke.The sun shall be turned into darkness,
And the moon into blood,Before the coming of the great and awesome day of the Lord. And it shall come to pass That whoever calls on the name of the Lord Shall be saved. For in Mount Zion and in Jerusalem there shall be deliverance, As the Lord has said, Among the remnant whom the Lord calls.

Coming of the Holy Spirit
Acts 2 
“When the Day of Pentecost had fully come, they were all with one accord in one place.  And suddenly there came a sound from heaven, as of a rushing mighty wind, and it filled the whole house where they were sitting. Then there appeared to them divided tongues, as of fire, and one sat upon each of them. And they were all filled with the Holy Spirit and began to speak with other tongues, as the Spirit gave them utterance. And there were dwelling in Jerusalem Jews, devout men, from every nation under heaven. And when this sound occurred, the multitude came together, and were confused, because everyone heard them speak in his own language. Then they were all amazed and marveled, saying to one another, “Look, are not all these who speak Galileans?  And how is it that we hear, each in our own language in which we were born?  Parthians and Medes and Elamites, those dwelling in Mesopotamia, Judea and Cappadocia, Pontus and Asia,  Phrygia and Pamphylia, Egypt and the parts of Libya adjoining Cyrene, visitors from Rome, both Jews and proselytes, Cretans and [d]Arabs—we hear them speaking in our own tongues the wonderful works of God.” So they were all amazed and perplexed, saying to one another, “Whatever could this mean?”  Others mocking said, “They are full of new wine.” But Peter, standing up with the eleven, raised his voice and said to them, “Men of Judea and all who dwell in Jerusalem, let this be known to you, and heed my words. For these are not drunk, as you suppose, since it is only [e]the third hour of the day. But this is what was spoken by the prophet Joel:  ‘And it shall come to pass in the last days, says God, That I will pour out of My Spirit on all flesh; Your sons and your daughters shall prophesy, Your young men shall see visions, Your old men shall dream dreams. And on My menservants and on My maidservants I will pour out My Spirit in those days; And they shall prophesy. I will show wonders in heaven above And signs in the earth beneath: Blood and fire and vapor of smoke. The sun shall be turned into darkness, And the moon into blood, Before the coming of the great and awesome day of the Lord. And it shall come to pass That whoever calls on the name of the Lord Shall be saved.’