Leviticus 6:28

Also the earthenware vessel in which it was boiled shall be broken; and if it was boiled in a bronze vessel, then it shall be scoured and rinsed in water.

Leviticus 11:33

As for any earthenware vessel into which one of them may fall, whatever is in it becomes unclean and you shall break the vessel.

Leviticus 15:12

However, an earthenware vessel which the person with the discharge touches shall be broken, and every wooden vessel shall be rinsed in water.

Hebrews 9:9-10

which is a symbol for the present time. Accordingly both gifts and sacrifices are offered which cannot make the worshiper perfect in conscience,

Treasury of Scripture Knowledge

Summary

But the earthen vessel wherein it is sodden shall be broken: and if it be sodden in a brasen pot, it shall be both scoured, and rinsed in water.

Bible References

General references

Leviticus 11:33
As for any earthenware vessel into which one of them may fall, whatever is in it becomes unclean and you shall break the vessel.
Leviticus 15:12
However, an earthenware vessel which the person with the discharge touches shall be broken, and every wooden vessel shall be rinsed in water.
Hebrews 9:9
which is a symbol for the present time. Accordingly both gifts and sacrifices are offered which cannot make the worshiper perfect in conscience,