Leviticus 10:9; Leviticus 10:15

9 "Do not drink wine or strong drink, neither you nor your sons with you, when you come into the tent of meeting, so that you will not die -it is a perpetual statute throughout your generations -

15 "The thigh offered by lifting up and the breast offered by waving they shall bring along with the offerings by fire of the portions of fat, to present as a wave offering before the LORD ; so it shall be a thing perpetually due you and your sons with you, just as the LORD has commanded."