New Living Translation
And I will give you treasures hidden in the darkness--secret riches. I will do this so you may know that I am the LORD, the God of Israel, the one who calls you by name.
English Standard Version
I will give you the treasures of darkness and the hoards in secret places, that you may know that it is I, the LORD, the God of Israel, who call you by your name.
New American Standard Bible
"I will give you the treasures of darkness And hidden wealth of secret places, So that you may know that it is I, The LORD, the God of Israel, who calls you by your name.