But skepticism over the authenticity of the ancient handwritten manuscript has arisen. Protestant pastor İhsan Özbek has said this version of the book is said to come from the fifth or sixth century, while St. Barnabas had lived in the first century as one of the Apostles of Jesus.
Hadiyth kuhusu neno hili ni nyingi sana lakini kufupisha katika Hadiyth iliyo sahihi, Mtume (Swalla Allaahu ‘alayhi wa aalihi wa sallam) alisema: “ Mimi ni Sayyid (bwana na mtukufu) katika watoto wa Aadam Siku ya Qiyaama ” (Muslim).