Malachi 3:17-18

And they shall be to me, sayeth the Lord of hostes, in that day that I shall do this, for a flocke, and I will spare them, as a man spareth his owne sonne that serueth him. Then shall you returne, and discerne betweene the righteous and wicked, betweene him that serueth God, and him that serueth him not.