'Sifting' in the Bible

The lips of the wise spread knowledge [sifting it as chaff from the grain];But the hearts of [shortsighted] fools are not so.

I said to myself regarding the sons of men, “God is surely testing them in order for them to see that [by themselves, without God] they are [only] animals.”

When the Lord has washed away the [moral] filth of the daughters of Zion and has cleansed the bloodstains of Jerusalem from her midst, by the spirit of judgment and by the spirit of burning,