Ruach ha Quodesh

When the day of Shavuot/ Pentecost had come, they were all together in one place.
Suddenly there came from heaven a sound like a mighty rushing wind, and it filled the whole house where they were sitting.
And tongues like fire spreading out appeared to them and settled on each one of them.
They were all filled with the Ruach ha-Kodesh and began to speak in other tongues as the Ruach enabled them to speak out. Act 2:1-4 TLV

Alohim/Elohim is a Spirit: and they that worship him must worship him in spirit and in truth. John 4:24
The Ruach ha-Quodesh (Kodesh/ Spirit of Holiness), is a divine spiritual force of the Almighty; sent to indwell the believer, as they enter into a Covenant relationship with the Heavenly Father through Messiah. The comforter/ intercessor/ advocate/ consoler [grk: paraklētos] Ruach ha-Quodesh whom the Father will send in My name, will teach you everything and remind you of everything that I said to you. John 14:26
The Ruach ha-Qodesh's purpose is to guide a believer, if willingly, in a dynamic spiritual walk.
This Spirit being one of seven.
And I looked and saw in the midst of the throne and of the four living creatures, and in the midst of the elders a Lamb standing, as having been slain, having seven horns and seven eyes, which are the seven Spirits of Alohim sent out into all the earth. Rev 5:6

Acts 2
5 And there were dwelling at Jerusalem Jews, devout men, out of every nation under heaven.
6 Now when this was noised abroad, the multitude came together, and were confounded, because that every man heard them speak in his own language.
7 And they were all amazed and marvelled, saying one to another, Behold, are not all these which speak Galilaeans?
8 And how hear we every man in our own tongue, wherein we were born?
9 Parthians, and Medes, and Elamites, and the dwellers in Mesopotamia, and in Judaea, and Cappadocia, in Pontus, and Asia,
10 Phrygia, and Pamphylia, in Egypt, and in the parts of Libya about Cyrene, and strangers of Rome, Jews and proselytes,
11 Cretes and Arabians, we do hear them speak in our tongues the wonderful works of Alohim.
12 And they were all amazed, and were in doubt, saying one to another, What meaneth this?
13 Others mocking said, These men are full of new wine.
14 But Peter, standing up with the eleven, lifted up his voice, and said unto them, Ye men of Judaea, and all ye that dwell at Jerusalem, be this known unto you, and hearken to my words:
15 For these are not drunken, as ye suppose, seeing it is but the third hour of the day.
16 But this is that which was spoken by the prophet Joel;
17 And it shall come to pass in the last days, saith Alohim, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
18 And on my servants and on my handmaidens I will pour out in those days of my Spirit; and they shall prophesy:
19 And I will shew wonders in heaven above, and signs in the earth beneath; blood, and fire, and vapour of smoke:
20 The sun shall be turned into darkness, and the moon into blood, before that great and notable day of אהיה come:
21 And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved.
22 Ye men of Israel, hear these words; אהיְשׁוּעָה of Nazareth, a man approved of Alohim among you by miracles and wonders and signs, which Alohim did by him in the midst of you, as ye yourselves also know:
23 Him, being delivered by the determinate counsel and foreknowledge of Alohim, ye have taken, and by wicked hands have crucified and slain:
24 Whom Alohim hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
25 For David speaketh concerning him, I foresaw אהיה always before my face, for he is on my right hand, that I should not be moved:
26 Therefore did my heart rejoice, and my tongue was glad; moreover also my flesh shall rest in hope:
27 Because thou wilt not leave my soul in hell, neither wilt thou suffer thine Quodesh One to see corruption.
28 Thou hast made known to me the ways of life; thou shalt make me full of joy with thy countenance.
29 Men and brethren, let me freely speak unto you of the patriarch David, that he is both dead and buried, and his sepulchre is with us unto this day.
30 Therefore being a prophet, and knowing that Alohim had sworn with an oath to him, that of the fruit of his loins, according to the flesh, he would raise up Messiah to sit on his throne;
31 He seeing this before spake of the resurrection of Messiah, that his soul was not left in hell, neither his flesh did see corruption.
32 This אהיְשׁוּעָה hath Alohim raised up, whereof we all are witnesses.
33 Therefore being by the right hand of Alohim exalted, and having received of the Father the promise of the Ruach ha Quodesh, he hath shed forth this, which ye now see and hear.
34 For David is not ascended into the heavens: but he saith himself, אהיה said unto my Master, Sit thou on my right hand,
35 Until I make thy foes thy footstool.
36 Therefore let all the house of Israel know assuredly, that Alohim hath made that same אהיְשׁוּעָה, whom ye have crucified, both Master and Messiah.
37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of אהיְשׁוּעָה Messiah for the remission of sins, and ye shall receive the gift of the Ruach ha Quodesh.
39 For the promise is unto you, and to your children, and to all that are afar off, even as many as אהיה our Alohim shall call.
40 And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.

Shavuot was when the golden calf incident occured (Exodus 32) and 3000 were killed and here 3000 are redeemed.