The Jewish holiday
There are two basic views amongst the Jews regarding this feast. The first considers it to Lev. 23:17, records that two “wave” loaves of bread of equal weight were baked with leaven. These two loaves were called the “first fruits.” The loaves represent sinful man, not the Lord and the Holy Spirit, because leaven is used. It seems clear they represent the bride of Christ made up of Jews and Gentiles, both with sin, unlike the unleavened bread at Passover which represented a sinless Messiah.
Jews read the story of Ruth on the Day of Pentecost, even today. It is a story of love and devotion, it centers around the harvest. The story also relates the ingathering of Ruth, the Moabitess, a Gentile woman who came to know Naomi and her God, and was accepted. On the birth of the local church, the way was paved for both Jew and Gentile to accept and be accepted as a part of the family of God. The Kinsman Redeemer BOAZ — allowed a Gentile to grafted into Israel. Christ is ours.
The harvest stops with the Fall harvest. Symbolically Christians are presently in the Summer harvest and must still be working in the fields until the Lord of the Harvest comes at the Second Coming and the Fall harvest is reaped. be the concluding ceremony of the Passover season. The second idea sees it as an independent festival. From a Biblical understanding of Pentecost it is better to view it as the conclusion of the fifty day Passover celebration. To divorce it from Passover is to lose the spiritual significance of the whole season.
The themes
The first major theme of Pentecost is of revelation. On this day the Ten Commandments were given to the Israel (Leviticus 23:15–21), exactly fifty days after they had crossed the Red Sea. Therefore Pentecost is the day that God revealed Himself and His will to His people. The second major theme is the outpouring of the Holy Spirit (Acts 1:8; 2:1–18). The resurrection of Christ took place on the Feast of First Fruits, fifty days later the Holy Spirit was given to His followers.
The outpouring of the Holy Spirit on the Day of Pentecost
In Exodus 19:19 we read that there was a trumpet blast that increased with strength. In Exodus 20:18 we read that the people heard great thundering coming from Mt. Sinai. The followers of the Lord Jesus Christ experienced spectacular manifestations also (Acts 2).
The Old Testament Pentecost speaks of the birth of Israel as a nation, but in the New we see it as the birth of the Church. The bread that was used on this day was burned upon the altar (Leviticus 23:15–17), and we see the sanctifying fire of the Holy Spirit falling on those in the Upper Room, sometimes referred to as ‘the baptism of fire’ (Luke 3:16). Pentecost was meant to lead Israel into a deeper relationship with God and a greater understanding of His Word. This is precisely what Pentecost in the New Testament is all about.
Conclusion
Pentecost could not be celebrated without Passover lamb being slain fifty days previously. The baptism in the Holy Spirit cannot be experienced by those who have never come to Christ for salvation. There could have been no outpouring of the Holy Spirit if the Lamb of God had not poured out His blood for us