Leviticus 23:15

15 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 there be complete:

Leviticus 23:15 In-Context

13 And the meal-offering thereof shall be two tenth parts [of an ephah] of fine flour mingled with oil, an offering made by fire unto Jehovah for a sweet savor; and the drink-offering thereof shall be of wine, the fourth part of a hin.
14 And ye shall eat neither bread, nor parched grain, nor fresh ears, until this selfsame day, until ye have brought the oblation of your God: it is a statute for ever throughout your generations in all your dwellings
15 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 there be complete:
16 even unto the morrow after the seventh sabbath shall ye number fifty days; and ye shall offer a new meal-offering unto Jehovah.
17 Ye shall bring out of your habitations two wave-loaves of two tenth parts [of an ephah]: they shall be of fine flour, they shall be baken with leaven, for first-fruits unto Jehovah.
The American Standard Version is in the public domain.