Age of the Nandas and Mauryas c12.s10.7

c12.s10.7

"When 236 years had elapsed after Nirvāṇa, sixty thousand monks dwelt in the Aśokārāma. Sectarians of different descriptions, all of them wearing the kaṣāya, ruined the Doctrine of the Jina. It was then that Tissa Moggaliputta convoked a council, attended by 1000 monks. Having destroyed the false doctrines and subdued many shameless people, he restored the true faith, and propounded the Abhidhamma treatise *Kathāvatthu*. It was from him that Mahendra, the future apostle of Buddha, learnt the 5 nikāyas, the 7 books of the Abhidhamma and the whole Vinaya.'