High Quality Content by WIKIPEDIA articles! The Comma Johanneum is a comma (a short clause) in the First Epistle of John (1 John 5:7–8) according to the Latin Vulgate text as transmitted since the Early Middle Ages, based on Vetus Latina minority readings dating to the 7th century. It was inserted into the Latin text based on a gloss to that text; the gloss itself may date to as early as the 3rd or 4th century. It was included in the Textus Receptus (TR) compiled by Erasmus of Rotterdam because of its doctrinal importance in supporting Trinitarianism. Owing to the widespread use of the Textus Receptus (TR) as the sole source, the comma is also contained in most translations published from 1522 until the latter part of the nineteenth century, for Protestant translation.