Romans 10:13-15

13For every one whosoever, who shall call on the name of the Lord, shall be saved.

14How then shall they call upon him in whom they have not believed? and how shall they believe on him of whom they have not heard? and how shall they hear without one who preaches?

15and how shall they preach unless they have been sent? according as it is written, How beautiful the feet of them that announce glad tidings of peace, of them that announce glad tidings of good things!