King Mahāsudassana 2.6.7

2.6.7

Atha kho, ānanda, rañño mahāsudassanassa aparena samayena vassasatassa vassasatassa accayena dvecattālīsaṃ dvecattālīsaṃ nāgasahassāni sakiṃ sakiṃ upaṭṭhānaṃ āgamaṃsu.

'From that time forth, Ânanda, the elephants came in alternate forty thousands, once each, every alternate hundred years.
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