Treasury of Scripture Knowledge
And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.
Feast of weeks
"You are also to observe the Feast of Harvest, the firstfruits of your labors that you have sown in the field, and the Feast of Ingathering at the end of the year when you have gathered in your harvest out of the field.
"'On the fourteenth day of the first month is the Lord's Passover.
"'On the fifteenth day of the seventh month you are to have a holy assembly; you must do no ordinary work, and you must keep a festival to the Lord for seven days.
Then you are to celebrate the Festival of Weeks before the Lord your God with the voluntary offering that you will bring, in proportion to how he has blessed you.
Now the Jewish feast of Tabernacles was near.
Now when the day of Pentecost had come, they were all together in one place.
"Three times in the year you must make a pilgrim feast to me.
"'You must count for yourselves seven weeks from the day after the Sabbath, from the day you bring the wave offering sheaf; they must be complete weeks.
You must count seven weeks; you must begin to count them from the time you begin to harvest the standing grain.