Leviticus 23:21
And ye shall proclaim on the selfsame day, that it may be an holy convocation unto you: ye shall do no servile work therein: it shall be a statute for ever in all your dwellings throughout your generations. And ye shall proclaim on the selfsame day, that it may be an holy convocation unto you: ye shall do no servile work therein: it shall be a statute for ever in all your dwellings throughout your generations.
The day appointed in the verse is Pentecost, observed fifty days after the offering of firstfruits. It is also called the feast of harvest and the feast of weeks. It expresses gratitude for grain prepared as food, and this thankfulness is marked by presenting two loaves baked with leaven before God. It occupies only one day, set apart as a holy convocation devoted to religious service with no servile work.