'Purges' in the Bible

My message is like a fire that purges dross! It is like a hammer that breaks a rock in pieces! I, the Lord, so affirm it!

As to every branch in me not bearing fruit, he takes it away; and as to every one bearing fruit, he purges it that it may bring forth more fruit.

If anyone therefore purges himself from these, he will be a vessel for honor, sanctified, and suitable for the master's use, prepared for every good work.