What's the first ancient document composed by a non-Christian denying the resurrection? What is the first ancient document composed by a non-Christian denying the resurrection of Jesus that we have access to?

I am specifically looking for a document actually penned by a non-Christian, so references to people denying the resurrection in a Christian document do not count. Further, Christian documents quoting non-Christian documents do not count.
Tacitus a Roman historian and Senator wrote an account to help explain the fire at Rome circa CE 116.  He references Christ, His death, but nothing about a resurrection, unless that is to what the "mischievous superstition" points.


  Consequently, to get rid of the report, Nero fastened the guilt and inflicted the most exquisite tortures on a class hated for their abominations, called Christians by the populace. Christus, from whom the name had its origin, suffered the extreme penalty during the reign of Tiberius at the hands of one of our procurators, Pontius Pilatus, and a most mischievous superstition, thus checked for the moment, again broke out not only in Judæa, the first source of the evil, but even in Rome, where all things hideous and shameful from every part of the world find their centre and become popular.
  -Annals 


In other words the Christian belief was that Messiah would suffer and rise again on the third day.  That is a "package" belief.  Tacitus denies it all as a superstition and merely points to its "fallen leader".