The attributes of Deity are ascribed to each of the Three.
"And when I saw him, I fell at his feet as dead. And he laid his right hand upon me, saying unto me, Fear not; I am the first and the last:" -- Rev. 1:17
"The same was in the beginning with God." -- John 1:2
"But thou, Bethlehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting." -- Micah 5:2
"Who are kept by the power of God through faith unto salvation ready to be revealed in the last time." -- I Peter 1:5
"And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me." -- II Corinthians 12:9
"Through mighty signs and wonders, by the power of the Spirit of God; so that from Jerusalem, and round about unto Illyricum, I have fully preached the gospel of Christ." -- Romans 15:19
"I the LORD search the heart, I try the reins, even to give every man according to his ways, and according to the fruit of his doings." -- Jeremiah 17:10
"And I will kill her children with death; and all the churches shall know that I am he which searcheth the reins and hearts: and I will give unto every one of you according to your works." -- Revelation 2:23
"For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God." -- I Corinthians 2:11
"Can any hide himself in secret places that I shall not see him? saith the LORD. Do not I fill heaven and earth? saith the LORD." -- Jeremiah 23:24
"For where two or three are gathered together in my name, there am I in the midst of them." -- Matthew 18:20
"Whither shall I go from thy spirit? or whither shall I flee from thy presence?" -- Psalm 139:7
"Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy: for all nations shall come and worship before thee; for thy judgments are made manifest." -- Revelation 15:4
"But ye denied the Holy One and the Just, and desired a murderer to be granted unto you;" -- Acts 3:14
Numerous references can be found, but the very name "Holy Spirit" implies His holiness.
"Then cried Jesus in the temple as he taught, saying, Ye both know me, and ye know whence I am: and I am not come of myself, but he that sent me is true, whom ye know not." -- John 7:28
"And to the angel of the church in Philadelphia write; These things saith he that is holy, he that is true, he that hath the key of David, he that openeth, and no man shutteth; and shutteth, and no man openeth;" -- Revelation 3:7
"This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth." -- I John 5:6
"Or despisest thou the riches of his goodness and forbearance and longsuffering; not knowing that the goodness of God leadeth thee to repentance?" -- Romans 2:4
Husbands, love your wives, even as Christ also loved the church, and gave himself for it;" -- Ephesians 5:25
"Thou gavest also thy good spirit to instruct them, and withheldest not thy manna from their mouth, and gavest them water for their thirst." -- Nehemiah 9:20
"That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ." -- I John 1:3
"The grace of the Lord Jesus Christ, and the love of God, and the communion of the Holy Ghost, be with you all. Amen." -- II Corinthians 13:14