There she was killed, her blood was caught in a basin, and was sprinkled seven times before the temple.

Then her flesh was burnt outside the city, and the ashes were carefully collected and mixed with water.

This water was put into a number of basins, and the priests and Levites went with it up and down the city, sprinkling it first on themselves, then on the men, women and children in the city, and afterwards on the wall, and the gates, and all that was to be dedicated to God.
All were to be made pure before they could be used in God's service.

The Great Master cannot use dirty vessels; they are not fit for His use, they cannot do His work.
If you want God to use you in His service, you must first be sprinkled, made pure from all defilement of sin.

Until this has been done you cannot do one single thing to please God; until you have been cleansed, it is impossible for you to work for God.
How, then, can we be cleansed?
How can we be made vessels meet for the Master's use, fit for the service of God?
Thank God, we have a better way of cleansing than by washing in the ashes of a heifer.
'For if the ashes of an heifer, sprinkling the unclean, sanctifieth to the purifying of the flesh: how much more shall the blood of Christ, who, through the Eternal Spirit offered Himself without spot to God, purge your conscience from dead works _to serve the living God ?_' Heb.
ix.