Leviticus 16:3-4

`With this doth Aaron come in unto the sanctuary; with a bullock, a son of the herd, for a sin-offering, and a ram for a burnt-offering;

a holy linen coat he putteth on, and linen trousers are on his flesh, and with a linen girdle he girdeth himself, and with a linen mitre he wrappeth himself up; they are holy garments; and he hath bathed with water his flesh, and hath put them on.