I will not drive them out from before thee in one year; lest the land should become desolate, and the beast of the field should multiply against thee.

Thou shalt therefore keep this ordinance in its season from year to year.

And Aaron shall make an atonement upon the horns of it once in a year, with the blood of the sin-offering of atonements: once in a year shall he make atonement upon it throughout your generations: it is most holy to the LORD.