Treasury of Scripture Knowledge
Seven weeks shalt thou number unto thee: begin to number the seven weeks from such time as thou beginnest to put the sickle to the corn.
Then observe the Festival of Weeks in the presence of the LORD your God by giving your tribute and the freewill offering of your hands in proportion to the manner in which the LORD your God blessed you.
You are to observe the Festival of Harvest, celebrating the first fruits of your work in planting the field, and the Festival of Tabernacles at the end of the year, when you gather the fruit of your work from the field.
"You are to observe the Festival of Weeks, the first fruits of the wheat harvest, and the Festival of Tabernacles at the turn of the year.
"Starting the day after the Sabbath, count for yourselves seven weeks from the day you brought the sheaf of the wave offering. They are to be complete.
"On the first day of your harvest season, you are to hold a sacred assembly when you present your first fruits during the Festival of Weeks. No servile work is to be done.
2 Chronicles 8:13
acting in compliance with the daily rule by offering them in conformity to commands issued by Moses for the Sabbaths, the New Moons, the three annual festivals (the Festival of Unleavened Bread, the Festival of Weeks, and the Festival of Tents).
When the day of Pentecost was being celebrated, all of them were together in one place.
1 Corinthians 16:8
However, I'll stay on in Ephesus until Pentecost,
For this reason we must pay closer attention to the things we have heard, or we may drift away,