Isaiah 45:18-19 (ish)
I stumbled on this verse the other day, and I really love it. Especially the part about not seeking him in vain.
He Says:
“I am the Lord, And there is no other.
I have not spoken in secret,
from somewhere in the Land of Darkness;
I have not said to Jacob’s Descendants,
‘Seek me in Vain’
I, The Lord, speak the truth;
I declare what is right”