Ezekiel 44:26

And after he is cleansed, they shall reckon unto him seven days.

Numbers 6:10-21

And on the eighth day he shall bring two turtle-doves, or two young pigeons, to the priest, to the door of the tent of meeting:

Numbers 19:11-14

He that toucheth the dead body of any man shall be unclean seven days:

Hebrews 9:13-14

For if the blood of goats and bulls, and the ashes of a heifer sprinkling them that have been defiled, sanctify unto the cleanness of the flesh:

Treasury of Scripture Knowledge

Summary

And after he is cleansed, they shall reckon unto him seven days.

Bible References

General references

Numbers 6:10
And on the eighth day he shall bring two turtle-doves, or two young pigeons, to the priest, to the door of the tent of meeting:
Numbers 19:11
He that toucheth the dead body of any man shall be unclean seven days:
Hebrews 9:13
For if the blood of goats and bulls, and the ashes of a heifer sprinkling them that have been defiled, sanctify unto the cleanness of the flesh:

American Standard Version Public Domain