Codex Sinaiticus (London, Brit. Libr., Add. 43725; Gregory-Aland nº א (Aleph) or 01) is a 4th century
uncial manuscript of the
Greek Bible, written between 330–350. While it originally contained the whole of both Testaments, only portions of the Greek
Old Testament or
Septuagint survive, along with a complete
New Testament, the
Epistle of Barnabas, and portions of
The Shepherd of Hermas (suggesting that the latter two may have been considered part of
Biblical canon by the editors of the
codex ). Along with
Codex Vaticanus, Codex Sinaiticus is one of the most valuable manuscripts for
textual criticism of the Greek New Testament, as well as the Septuagint. For most of the New Testament, Codex Sinaiticus is in general agreement with Codex Vaticanus and
Codex Ephraemi Rescriptus, attesting an
Alexandrian text-type, but in John 1:1-8:38, Codex Sinaiticus is in closer agreement with
Codex Bezae in support of a
Western text-type. A notable example of an agreement between the Sinaiticus and Vaticanus texts is that they both omit the phrase "without cause" from Matthew 5:22.
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