Matthew Henry, Commentary on the Whole Bible… (1700s)
“ The Thessalonians are exhorted to stedfastness in their Christian profession, to hold fast the traditions which they had been taught, or the doctrine of the gospel, which had been delivered by the apostle, by word or epistle. As yet the canon of scripture was not complete, and therefore some things were delivered by the apostles in their preaching, under the guidance of the infallible Spirit, which Christians were bound to observe as coming from God ”
