Codex Regius matters because it preserves a later yet valuable Gospel witness that often supports the Alexandrian line while exposing secondary expansions.
The Legacy of the Codex Regius in New Testament Textual Criticism
Why is Luke 9:55-56 Omitted From Our Modern Bibles?
The shorter version is found in very early manuscripts, although the longer version is used by most Latin manuscripts, which is why it is also present in early English translations. The shorter version, omitting the doubted phrases in both verses, appears in א A B C L W X Δ Ξ Ψ p45 P75, but the words do appear (with minor variants) in some slightly later authorities, such as D and K (D contains the phrase in verse 55, but not the phrase in verse 56).
