Romans 11:33,34
O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!
Torrey's Topical Textbook—AKJV

1 Corinthians 2:10,11
But God has revealed them to us by his Spirit: for the Spirit searches all things, yes, the deep things of God.
Torrey's Topical Textbook—AKJV