Hebrews 9:13

For if the blood of bulls and goats and a heifer's ashes sprinkling those who are ceremonially unclean purifies them with physical cleansing,

2 Corinthians 5:21

He made Him who personally knew nothing of sin to be a sin-offering for us, so that through union with Him we might come into right standing with God.

2 Corinthians 7:1

So, since we have such promises as these, dearly beloved, let us cleanse ourselves from everything that defiles our bodies and spirits, and in reverence to God carry on our consecration to completeness.

Hebrews 7:26

For we needed such a High Priest, holy, innocent, unstained, far removed from sinful men, and elevated far above the very heavens,

Treasury of Scripture Knowledge

Summary

And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a water of separation: it is a purification for sin.

A water of separation

Bible References

Clean

2 Corinthians 5:21
He made Him who personally knew nothing of sin to be a sin-offering for us, so that through union with Him we might come into right standing with God.
Hebrews 7:26
For we needed such a High Priest, holy, innocent, unstained, far removed from sinful men, and elevated far above the very heavens,
Hebrews 9:13
For if the blood of bulls and goats and a heifer's ashes sprinkling those who are ceremonially unclean purifies them with physical cleansing,

A water of separation

2 Corinthians 7:1
So, since we have such promises as these, dearly beloved, let us cleanse ourselves from everything that defiles our bodies and spirits, and in reverence to God carry on our consecration to completeness.