John says that a report spread "among the brethren" that the beloved disciple would not die. The Gospel then pauses to explain that this was not what Jesus had actually said.
Jesus in Context
A Saying Went Abroad Among the Brethren
John records how a saying about the beloved disciple circulated among early Christians and changed as it was repeated.
Introduction
Historical and Cultural Context
Early Christians commonly addressed one another with familial language such as brothers and sisters. John's phrase therefore describes the circulation of a report within the believing community. The episode provides a rare New Testament glimpse of oral transmission occurring around a saying of Jesus.
The report is close to Jesus' words but significantly different from them: a hypothetical "if I will that he tarry" becomes the categorical claim that the disciple will not die.
Why It Matters
The Gospel itself demonstrates that sincere communities can repeat a saying inaccurately. John does not defend the popular version merely because it has circulated among believers; he returns readers to what Jesus actually said.