The Epistle of Barnabas is in the collection known as the Apostolic Fathers.  The date is sometime late first century / early second century AD.  While there is debate as to who exactly is the author of the work, there is a scholarly consensus that it not the Barnabas who was the companion of the Apostle Paul.  The citations below are taken from the translastion in the Ante-Nicene Fathers, accessible on the CCEL website here.

For to this end the Lord endured to deliver up His flesh to corruption, that we might be sanctified through the remission of sins, which is effected by His blood of sprinkling. For it is written concerning Him, partly with reference to Israel, and partly to us; and [the Scripture] saith thus: “He was wounded for our transgressions, and bruised for our iniquities: with His stripes we are healed. He was brought as a sheep to the slaughter, andas a lamb which is dumb before its shearer.” (5.1)

Moreover, when fixed to the cross, He had given Him to drink vinegar and gall. Hearken how the priests of the people gave previous indications of this. His commandment having been written, the Lord enjoined, that whosoever did not keep the fast should be put to death, because He also Himself was to offer in sacrifice for our sins the vessel of the Spirit, in order that the type established in Isaac when he was offered upon the altar might be fully accomplished. (7.1)

Jerry Shepherd
Lent
March 7, 2015