Codex Fuldensis

It is an important witness in any discussion about the authenticity of 1 Corinthians 14:34–35[4] and the Comma Johanneum.

[6] The four gospels are harmonised into a single continuous narrative, according to the form of Tatian's Diatessaron.

[3] The harmonised gospel text is preceded by a listing of its sections, with a summary of their contents, which was copied unchanged from the Old Latin exemplar.

Perhaps the scribe, without actually deleting verses 34–35 from the text, intended the liturgist to omit them when reading the lesson.

Victor of Capua (died 554) reports that he found an Old Latin harmony of the Gospels, which he recognised as following Tatian's arrangement of the Diatessaron.

[6] It served as the source text for vernacular harmonies in Old High German and Old Saxon.