NET
15 And how are they to preach unless they are sent? As it is written, “How timely is the arrival of those who proclaim the good news.”
Darby
15 and 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!
KJV
15 And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!