Leviticus 23:15
"'And ye shall count from the morrow after the Sabbath: even from the day that ye brought the sheaf of the wave offering, seven weeks complete:
Exodus 34:22
Thou shalt observe the feast of weeks with the first fruits of wheat harvest, and the feast of ingathering at the years' end.
Leviticus 23:10-11
"Speak unto the children of Israel, and say unto them, 'When ye be come into the land which I give unto you and reap down your harvest, ye shall bring a sheaf of the first fruits of your harvest unto the priest,
Leviticus 25:8
"'Then number seven weeks of years, that is, seven times seven years: and the space of the seven weeks of years will be unto thee forty nine years.
Deuteronomy 16:9-10
Then reckon the seven weeks, and begin to reckon the seven weeks when the sickle beginneth in the corn,
Numbers 28:26
And the day of your first fruits when ye bring a new meat offering unto the LORD in your weeks, shall be a holy feast unto you: