John Chrysostom : "Whereof the Holy Ghost also is a witness to us." He had said that those sacrifices are not offered; he reasoned from what is written, and from what is not written; moreover also he put forward the prophetic word which says, "sacrifice and offering Thou wouldest not." He had said that He had forgiven their sins. Again this also He proves from the testimony of what is written, for "the Holy Ghost" (he says) "is a witness to us: for after that He had said, This is the covenant, that I will make with them, after those days, saith the Lord: I will put My laws into their hearts, and in their minds will I write them, and their sins and iniquities will I remember no more. Now where remission of these is there is no more offering for sin." So then He forgave their sins, when He gave the Covenant, and He gave the Covenant by sacrifice. If therefore He forgave the sins through the one sacrifice, there is no longer need of a second. — Homily on Hebrews 18 Oecumenius : "And the Holy Spirit also testifies to us." What does it bear witness to? That our sins have been forgiven. — The Pseudo-Oecumenian Catena on Hebrews