When Peter said in Acts 2:17 that this event called Pentecost was to signify that God would pour out His Spirit on all flesh it stands to reason that there were people there who had not become Jews.
Acts 1
1In the first book, O Theophilus, I have dealt with all that Jesus began to do and teach, 2until the day when he was taken up, after he had given commands through the Holy Spirit to the apostles whom he had chosen. 3He presented himself alive to them after his suffering by many proofs, appearing to them during forty days and speaking about the kingdom of God.
4And while stayinga with them he ordered them not to depart from Jerusalem, but to wait for the promise of the Father, which, he said, “you heard from me; 5for John baptized with water, but you will be baptized withb the Holy Spirit not many days from now.”
The Ascension
6So when they had come together, they asked him, “Lord, will you at this time restore the kingdom to Israel?” 7He said to them, “It is not for you to know times or seasons that the Father has fixed by his own authority. 8But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth.”
Acts 2
1When the day of Pentecost arrived, they were all together in one place. 2And suddenly there came from heaven a sound like a mighty rushing wind, and it filled the entire house where they were sitting. 3And divided tongues as of fire appeared to them and resteda on each one of them. 4And they were all filled with the Holy Spirit and began to speak in other tongues as the Spirit gave them utterance.
5Now there were dwelling in Jerusalem Jews, devout men from every nation under heaven. 6And at this sound the multitude came together, and they were bewildered, because each one was hearing them speak in his own language. 7And they were amazed and astonished, saying, “Are not all these who are speaking Galileans? 8And how is it that we hear, each of us in his own native language? 9Parthians and Medes and Elamites and residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, 10Phrygia and Pamphylia, Egypt and the parts of Libya belonging to Cyrene, and visitors from Rome, 11both Jews and proselytes, Cretans and Arabians—we hear them telling in our own tongues the mighty works of God.” 12And all were amazed and perplexed, saying to one another, “What does this mean?” 13But others mocking said, “They are filled with new wine.”
......
Now there were dwelling in Jerusalem
Jews, devout men from every nation under heaven.
every nation under heaven?
did that include Guatemala and Canada?
or did it mean the known world at the time - primarily pertaining to ISRAEL - within the Roman Empire.
look at a map and see what Rome controlled.
Peter said Pentecost was what Israel's prophet Joel had prophesied - FOR ISRAEL.
Acts 2
16But this is what was uttered through the prophet Joel:
17 “‘And in the last days it shall be, God declares,
that I will pour out my Spirit
on 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
even on my male servantsc and female servants
in those days I will pour out my Spirit, and
they shall prophesy.
all flesh means just what it says in Joel: not just the Teachers of the Law, not just the men of Israel, not just the rich or the young:
sons and your daughters
young men
old men
male servants
female servants
that's the promise to ISRAEL.
in Jerusalem.
if there were uncircumcised in there, it would be no different from the gentiles which were always among the mixed multitude.
the promise was to israel - the jews.
all flesh is the same as every nation under heaven - it's an all inclusive statement about ISRAEL.
the gentiles were always to be included AS A PEOPLE GROUP - NATIONS (the promise to Abraham) - plural, but the gospel went to them LATER....very shortly after. but it went Israel. FIRST.
this is who
the speakers were:
Acts 1
1In the first book, O Theophilus, I have dealt with all that Jesus began to do and teach, 2until the day when he was taken up, after he had given commands through the Holy Spirit to the apostles whom he had chosen. 3He presented himself alive to them after his suffering by many proofs, appearing to them during forty days and speaking about the kingdom of God.
4And while stayinga with them he ordered them not to depart from Jerusalem, but to wait for the promise of the Father, which, he said, “you heard from me; 5for John baptized with water, but you will be baptized withb the Holy Spirit not many days from now.”
The Ascension
6So when they had come together, they asked him, “Lord, will you at this time restore the kingdom to Israel?” 7He said to them, “It is not for you to know times or seasons that the Father has fixed by his own authority. 8But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth.”
1When the day of Pentecost arrived, they were all together in one place.
this is who the crowd was:
5Now there were dwelling in Jerusalem
Jews, devout men from every nation under heaven. 6And at this sound the multitude came together, and they were bewildered, because each one was hearing them speak in his own language. 7And they were amazed and astonished, saying, “Are not all these who are speaking Galileans? 8And how is it that we hear, each of us in his own native language? 9Parthians and Medes and Elamites and residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, 10Phrygia and Pamphylia, Egypt and the parts of Libya belonging to Cyrene, and visitors from Rome, 11both Jews and proselytes, Cretans and Arabians—we hear them telling in our own tongues the mighty works of God.” 12And all were amazed and perplexed, saying to one another, “What does this mean?” 13But others mocking said, “They are filled with new wine.”