There is no doubt that Paul wrote Hebrews. And Peter also declared that to be so.
Please give me the scripture you are referring to (Peter declared that Paul wrote Hebrews). Thank you. As for the rest of your posts to me, I won’t take the time to explain 2 Tim. 2:15 to you. You evidently believe you are a workman that is pleasing God. And will not be ashamed when you stand before Him. Good luck with that.
Sure, just like the gospel of Matthew was written in Hebrew, even though nobody has a shred of evidence to support the claim.