Bible Verses About Quotations and Allusions: Romans 15:21, »To whom he was not spoken of...«

so now he will startle many nations; because of him, kings will be speechless. For they will see what they had not been told, they will ponder things they had never heard."

but rather, as the Tanakh puts it, “Those who have not been told about him will see, and those who have not heard will understand.”