This statement is quoted by Paul in 1 Timothy 5:18, the only place where a New Testament writer quotes another New Testament passage as "Scripture." This gives incidental confirmation of the New Testament--Luke in particular--as being on a par with the Old Testament Scriptures.

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8