Leviticus 23:15
" 'And you shall count for yourselves {from the day after} the Sabbath, from the day of your bringing the wave offering's sheaf--[there] shall be seven full weeks.
Exodus 34:22
And {you yourself} will observe the Feast of Weeks--the firstfruits of the wheat harvest--and the Feast of Harvest Gathering at the turn of the year.
Leviticus 23:10-11
"Speak to the {Israelites}, and say to them, 'When you come to the land that I [am about] to give to you and you reap its harvest, then you shall bring a sheaf of the firstfruit of your harvest to the priest.
Leviticus 25:8
" 'And you shall count for yourself seven Sabbaths of years, seven times seven years, and they shall be for you {time periods of} years: {forty-nine} years.
Deuteronomy 16:9-10
"You shall count [off] seven weeks for you; {from the time you begin to harvest the standing grain} you shall begin to count seven weeks.
Numbers 28:26
" 'And on the day of firstfruits, when you are presenting a new offering for Yahweh during your Festival of Weeks, you will have a holy convocation; {you will not do any regular work}.