Leviticus 16:2
And the LORD <03068> said <0559> (8799) unto Moses <04872>, Speak <01696> (8761) unto Aaron <0175> thy brother <0251>, that he come <0935> (8799) not at all times <06256> into the holy <06944> place within <01004> the vail <06532> before <06440> the mercy seat <03727>, which is upon the ark <0727>; that he die <04191> (8799) not: for I will appear <07200> (8735) in the cloud <06051> upon the mercy <03727> seat.