Pentecost] so called because it was the fiftieth day from the first day of the Passover. It was also called 'the Feast of Weeks,' because it occurred a week of weeks (i.e. seven weeks) after the Passover. It marked the completion of the corn harvest, and according to the later Jews it commemorated the giving of the Law on Sinai. The characteristic ritual of this feast was the offering and waving of two leavened loaves of wheaten flour, together with a sin offering, burnt offerings, and peace offerings (Leviticus 23:15-20). Appropriately, therefore, on this day the gospel harvest began; and the old Law of ordinances was superseded by the new Law of love.
Related Commentaries of Acts 2:1
Acts 2:1
1 And when the day of Pentecost was fully come, they were all with one accord in one place.