In Romans 4:17 Paul quotes Genesis 17:5, with the introductory formula καθὼς γέγραπται ὅτι. The ὅτι seems to be functioning as nothing more than quotation marks (as it often does in the Greek NT). There is a little ambiguity in that the part of Genesis 17:5 that he quotes (πατέρα πολλῶν ἐθνῶν τέθεικά σε) is preceded by ὅτι. One could make the case that the introductory formula in Romans is just καθὼς γέγραπται and the ὅτι comes not from Paul but from Genesis. Though I doubt that's true.
Either way, this has me curious as to how I can use the search feature to find given uses of introductory formulas before Paul quotes Scripture. Searching καθὼς γέγραπται seems easy enough. But what if I want to look for every time Paul uses ὅτι before a quotation? Or something else? Searching ὅτι and manually going through the results in that case takes time--time well-spent, but I'm curious if there's a way in a given text (NA27) that already recognizes quotations (by italicizing them) to find all the times a certain word or words introduce a quotation.
