"You are to count seven weeks, counting the weeks from the time the sickle is first [put] to the standing grain.
Deuteronomy 16:9 In-Context
Roast it and eat it at the place the LORD your God will choose. Then in the morning return to your tents.
For six days eat unleavened bread and on the seventh day hold an assembly to the LORD your God and do no work.
Count off seven weeks from the time you begin to put the sickle to the standing grain.
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.
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.