The historical records for the so-called "second buddhist council " derive primarily from the canonical vinayas of various school .in most cases these accounts are found at the end of the skandhaka portion of the vinaya.while inevitably disagreeing on points of details they nevertheless agree on roughly the following about 100 or 110 years after the buddha's nirvana amonk colled yasa when visiting vesali noticed a number of lax practices among the lacal monks