What does the Bible say about the red heifer's significance?

The red heifer, as detailed in Numbers 19, serves as a powerful type and shadow of Jesus Christ. The heifer was required to be without blemish and used for purification, representing the necessity for a perfect sacrifice to atone for sin. Unlike the sacrifices of the Old Covenant, which were insufficient, the red heifer foreshadows Christ's sacrifice, who fulfilled all requirements for the cleansing of sin. The ashes of the heifer were used for the cleansing rituals, symbolizing how Christ's death and resurrection provide the ultimate purification from sin, completing what the law could not accomplish.