Revelation 15:3

And they sung the song of Moses the servant of God, and the song of the Lamb, saying: Great and wonderful are thy works, Lord God Almighty; just and true are thy ways, thou King of saints.

Romans 11:33-34

the depth of the riches, both of the wisdom and of the knowledge of God! How unsearchable are his judgments, and his ways past finding out!

1 Corinthians 2:10

But God has revealed them to us through his Spirit; for the Spirit searches all things, even the deep things of God.

Treasury of Scripture Knowledge

Summary

O LORD, how great are thy works! and thy thoughts are very deep.

Bible References

O lord

Revelation 15:3
And they sung the song of Moses the servant of God, and the song of the Lamb, saying: Great and wonderful are thy works, Lord God Almighty; just and true are thy ways, thou King of saints.

Deep

1 Corinthians 2:10
But God has revealed them to us through his Spirit; for the Spirit searches all things, even the deep things of God.