Weeks or pentecost

festival of weeks Count off seven weeks from the time you begin to put the sickle to the standing grain.
Exodus 34:22
And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.

levi 23.15 -end

numbers 28.26 King James Bible
Also in the day of the firstfruits, when ye bring a new meat offering unto the LORD, after your weeks be out, ye shall have an holy convocation; ye shall do no servile work:
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deut 16.9

The Festival of Weeks

⁹ Count off seven weeks from the time you begin to put the sickle to the standing grain. ¹⁰ Then celebrate the Festival of Weeks to the Lord your God by giving a freewill offering in proportion to the blessings the Lord your God has given you. ¹¹ And rejoice before the Lord your God at the place he will choose as a dwelling for his Name—you, your sons and daughters, your male and female servants, the Levites in your towns, and the foreigners, the fatherless and the widows living among you. ¹² Remember that you were slaves in Egypt, and follow carefully these decrees.


deut 16.10
deut 16.16