'Searching' in the Bible

and He who is searching the hearts hath known what is the mind of the Spirit, because according to God he doth intercede for saints.

searching in regard to what or what manner of time the Spirit of Christ that was in them was manifesting, testifying beforehand the sufferings of Christ and the glory after these,

and her children I will kill in death, and know shall all the assemblies that I am he who is searching reins and hearts; and I will give to you -- to each -- according to your works.