A logoi of Matthew the Apostle

They say in the traditions that Matthew the apostle constantly said, that “if the neighbor of an elect man sin, the elect man has sinned. For had he conducted himself as the Word prescribes, his neighbor also would have been filled with such reverence for the life he led as not to sin.”

Clement of Alexandria
The Stromata, Book VII
Chapter XIII

Clement quotes a lost logoi of Jesus

For it is not in the way of envy that the Lord announced in a Gospel, “My mystery is to me, and to the sons of my house;” placing the election in safety, and beyond anxiety; so that the things pertaining to what it has chosen and taken may be above the reach of envy.

Clement of Alexandria
The Stromata, Book V
Chapter X

As You Do, So You Will Receive

For thus He spoke: “Be ye merciful, that ye may obtain mercy; forgive that it may be forgiven to you; as ye do, so shall it be done unto you; as ye judge, so shall ye be judged; as ye are kind, so shall kindness be shown to you; with what measure ye mete, with the same it shall be measured to you.”

Clement of Rome
First Epistle to the Corinthians
Chapter XIII