And thou shalt remember all the way by which the LORD thy God led thee these forty years in the wilderness to afflict thee and to prove thee to know what was in thine heart, whether thou would keep his commandments, or not.

let me be weighed in a just balance, that God may know my integrity.

The fining pot is for silver, and the furnace for gold, but the LORD tries the hearts.

And I will put the third part into the fire and will refine them as silver is refined and will try them as gold is tried; He shall call on my name, and I will hear him; I will say, My people, and he shall say, The LORD is my God.

But who may abide the time of his coming? and who shall stand when he appears? for he shall be like a refiner's fire and like fullers' soap:

that the trial of your faith, being much more precious than of gold (which perishes, nevertheless it is tried with fire), might be found unto praise and glory and honour when Jesus, the Christ, is made manifest;

General references

For his eyes are upon the ways of man, and he sees all his steps.

Examine me, O LORD and prove me; melt my kidneys and my heart.