Taken from an  article by John Adey –

Complementary Difference: Why New Testament quotations often differ from their Old Testament source.

“On Jesus’ authority (Divinely inspired) “Scripture cannot be broken” (Jn. 10:35).  Yet this perspective may seem difficult to reconcile with New Testament  ‘quotations’ of the Old Testament (OT) which differ from the OT as we have it, based on the Hebrew Masoretic text (MT).   For example, some may feel that a quotation has to be a verbatim (word-for-word) repetition of something previously expressed. On this view, any variation in quotation fractures expectations about how inspired Scripture should behave.  However, not only is this to impose a strict view of ‘quotation’ onto the Bible, but can misdirect unedifyingly into criticism of the text of the Hebrew Bible, as per MT or its consonantal antecedents. Neither reaction (the verbatim, or finding fault with the text of the OT/MT), as I hope to show, is consistent with the nature of Scripture.“

The full article is available in the new “Bible Quotations” page on this website.