Acts Chapters One and Two

In regards to whom was "speaking in tongues during Pentecost" I have learned from reading Scriptures that Acts Chapters 1 and 2 are two separate events: 

• Chapter 1 relates to the 40th day after the resurrection of Yahshua and the remaining nine days until Shavuot
• Chapter 2 relates to the 50th day, Shavuot (Pentecost) after the resurrection of  Yahshua and the events of that day

Y'shua and his followers did live according to Yah's Instructions (Torah) and would have observed the celebration of Shavuot per His Instructions:

Exodus 34:22- "Feast of Weeks" is one of the three set times Yahweh commanded His people to observe, coming from their homes to Jerusalem. This is the time of the counting of days (49 days = 7 weeks) from the barley harvest. Day 50 is Shavuot.

Exodus 34:23- He specifies that those three times a year only all the men gather in Jerusalem bringing the appropriate first fruit offerings from the wheat harvest to the priest at the temple.

Leviticus 23:15- gives more detail on procedures, pointing out that on day 50 was when the new grain offering was made.

Deuteronomy 16:9- offers a recap.

This clears up a misconception and shows that only the men gathered at the temple on this day- there were no women in or around the temple during Shavuot, in obedience to the Instructions of Yahweh.  Maryam, the mother of Y'shua, was not there and did not speak a foreign language.  She was, however, gathered with the Apostles and other women in an upper room, according to Acts Chapter 1 a few days before Shavuot.

Chapter 1 is the account of Y'shua giving his final instructions to his Apostles. He tells them not to leave Jerusalem, to wait there for the promise of the Father.  He lets them know that in a few days they would be immersed by the Ruach haKodesh, and when it does they would receive power and be witnesses for Y'shua in Jerusalem, and in all of Judah, also among the Samaritans and to the ends of the earth.  It was after these things he spoke of that they, the Apostles - the men from Galilee - watched him as he was taken up and concealed in a cloud. They were standing there, looking up, when 2 men (angels?) asked, "Galilean men, why are you standing and staring into heaven? This Y'shua who was taken up from you to heaven, likewise he will come just as you have seen him who ascended into heaven."

They, the 11 Apostles, return to Jerusalem and went up into an upper room where they were in steadfast prayer. There were also the women who were with Maryam the mother of Y'shua, and his brothers.  In those days (the 10 day span from when they saw Y'shua taken up and not yet Shavuot, the 50th day) about 120 men had gathered and Simon Peter stands up to speak. He realizes that Scriptures were fulfilled in regards to Judas and also Matthias is chosen as the 12th Apostle.  This ends Chapter 1 of Acts.

• Matthew 13:55 (the brothers of Yahshua: James, Joseph, Simon and Jude)

Note: It makes sense that during this time that there would be a gathering of Set Apart believers seeking out the Apostles, as men were making the trip to Jerusalem from throughout the territories to bring offerings to the priest at the temple. They were hearing about the death and resurrection of Yahshua.

Chapter 2 Verse 1 begins with the fifty days of Shavuot fulfilled (it is now the 50th day), all were assembled as one in the Father's House = the temple in Jerusalem. A sound from heaven like a roaring wind was heard and the entire House was filled. And it appeared to them like tongues divided and fire sat upon everyone of them, the Apostles, who were then filled with the Ruach haKodesh and were compelled to speak in different languages - just as the Spirit had given them to speak.

This was the promised fulfilled, the one Yahshua had told the Apostles to wait for, written in Chapter 1.

How do we know at this time is was just the 12 Apostles that were being filled with the Set Apart Spirit from Yahweh?  Because those who were hearing them speak in different languages referred to them as Galileans.  (They were also referred to as Galileans in Chapt. 1.) Act 2 verse 7- "... these, all of them who are speaking, are Galileans." It was an astonishing event! Although there were those who were mocking them, and once again Simon Peter stands up to speak and gives testimony. (Verse 14 through 36). Some readily received his word and believed and were immersed - about 3,000 souls that day.  We do not read of anyone else speaking in tongues that day.

From that day onward they were all steadfast in their teaching of the Apostles and were in fellowship in prayer and breaking of bread.  Signs and mighty deeds were performed by the Apostles in Jerusalem.  And all those who had believed shared everything they owned with one another. Those who had a possession would sell it and divide evenly to each according to their needs. Every day they were steadfast in the temple as one soul.  While they received food and rejoiced in the simplicity of their hearts, they were praising Elohim and finding favor with the people. Everyday Master Yahshua would add to those who lived among the congregation.  That ends Acts Chapter 2.