3 John

The Third Epistle of John is a letter written by the apostle John, identified traditionally as John the Evangelist, to a man named Gaius. The letter was likely written between 85 and 95 AD. The purpose of the letter is to commend Gaius for his hospitality towards traveling Christian teachers and to warn him against Diotrephes, a church leader who refused to acknowledge John's authority and excommunicated members who showed support for John's messengers.