Leviticus 23:15
From the day after the Sabbath, the day you brought the sheaf of the wave offering, you are to count off seven full weeks.
Berean Standard Bible
And ye shall count unto you from the morrow after the sabbath, from the day that ye brought the sheaf of the wave offering; seven sabbaths shall be complete:
“‘You shall count from the next day after the Sabbath, from the day that you brought the sheaf of the wave offering: seven Sabbaths shall be completed.