Leviticus 11:24

And such were excluded both from the courts of God's house, and from free conversation with other men. Until the even; which possibly might signify that even the smallest defilements could not be cleansed but by the death of Christ, who was to come and offer up himself in the evening, or end, or declining age of the world, as the prophets signify, and the apostle expresseth, Hebrews 9:26.