from John 20
Jesus Appears to His Disciples
19 On the evening of that first day of the week, when the disciples were together, with the doors locked for fear of the Jewish leaders, Jesus came and stood among them and said, “Peace be with you!” 20 After he said this, he showed them his hands and side. The disciples were overjoyed when they saw the Lord.
21 Again Jesus said, “Peace be with you! As the Father has sent me, I am sending you.” 22 And with that he breathed on them and said, “Receive the Holy Spirit. 23 If you forgive anyone’s sins, their sins are forgiven; if you do not forgive them, they are not forgiven.”
It seems Jesus had already given them the Holy Spirit, so I think it is clear the disciples were believers, and Pentecost was a separate/secondary event.
**John 20.......:22 And with that he breathed on them and said, “Receive the Holy Spirit. ..It seems Jesus had already given them the Holy Spirit**
That was a command to them to receive it. That didn’t happen until Pentecost (Acts 2)
Luke 24:47-49 “..And that repentance and remission of sins should be preached in my NAME (see Acts 2:38) among ALL nations, BEGINNING at Jerusalem. 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”.
Acts 1:4-8 And...not depart from Jerusalem, but “wait for the promise of the Father, which,” saith he, “ye have heard of me. For John truly baptized with water, but ye shall be baptized with the Holy ghost not many days hence.”.....”But ye shall receive power, after that the Holy Ghost is come upon you....”.
Paul, speaking to the church in Rome (people that already knew the plan of salvation and how to be born again) said, “But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his”. Romans 8:9