[RnMomof7]

If indeed it is a "quote" and not just a coincidence that the same phrase is used, how do you know Paul quoted Luke and not the other way around?

The gospel of Luke and Acts are believed written 60-62 AD. The Letter(gospel) having been written first.

Paul wrote Timothy and Titus after his realease from prison 62-64AD

The letter written by Luke would have had wide circulation.

There are some that believe that Pauls use of the word "scripture" in that passage is meant for both the OT quote and Luke...But that is not as important a point as the fact he quoted it with authority

[SoothingDave]

Well, I'm not convinced that it's a quotation to begin with, and a chain of historical events has to line up just right for your theory to work. It's a lot simpler to jsut accept the canon cause the Church canonized it.

SD