Numbers 10:8

And the sons of Aaron , the priests , shall blow the trumpets . The trumpets shall be to you for a perpetual statute throughout your generations .

“The sons of Aaron, the priests, are to blow the trumpets. This is to be a lasting ordinance for you and the generations to come.

And the sons of Aaron, the priests, shall blow with the trumpets; and they shall be to you for an ordinance for ever throughout your generations.