Tertullian
Patristic
c. A.D. 150–220
“For there is extant withal an Epistle to the Hebrews under the name of Barnabas-a man sufficiently accredited by God, as being one whom Paul has stationed next to himself in the uninterrupted observance of abstinence: "Or else, I alone and Barnabas, have not we the power of working? " And, of course, the Epistle of Barnabas is more generally received among the Churches than that apocryphal "Shepherd" of adulterers.”