Here are 7 Bible verses about power of the Holy Spirit from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Acts 1:8 KJV
But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.
Ezekiel 37:11-14 KJV
Then he said unto me, Son of man, these bones are the whole house of Israel: behold, they say, Our bones are dried, and our hope is lost: we are cut off for our parts. Therefore prophesy and say unto them, Thus saith the Lord GOD; Behold, O my people, I will open your graves, and cause you to come up out of your graves, and bring you into the land of Israel. And ye shall know that I am the LORD, when I have opened your graves, O my people, and brought you up out of your graves, And shall put my spirit in you, and ye shall live, and I shall place you in your own land: then shall ye know that I the LORD have spoken it, and performed it, saith the LORD.
Romans 1:4 KJV
And declared to be the Son of God with power, according to the spirit of holiness, by the resurrection from the dead:
Luke 4:14 KJV
And Jesus returned in the power of the Spirit into Galilee: and there went out a fame of him through all the region round about.
Luke 24:49 KJV
And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
Luke 11:20 KJV
But if I with the finger of God cast out devils, no doubt the kingdom of God is come upon you.
Luke 1:35 KJV
And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.