Numbers 15:21

21 Throughout the generations to come you are to give this offering to the LORD from the first of your ground meal.

Read Numbers 15:21 Using Other Translations

Of the first of your dough ye shall give unto the LORD an heave offering in your generations.
Some of the first of your dough you shall give to the LORD as a contribution throughout your generations.
Throughout the generations to come, you are to present a sacred offering to the LORD each year from the first of your ground flour.