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Atha kho bhagavā āyasmantaṃ ānandaṃ āmantesi –
‘‘siyā kho panānanda, tumhākaṃ evamassa – ‘
atītasatthukaṃ pāvacanaṃ, natthi no satthā’ti.
Na kho panetaṃ, ānanda, evaṃ daṭṭhabbaṃ. 
Yo vo, ānanda, mayā dhammo ca vinayo ca desito paññatto, so vo mamaccayena satthā."

Then the Sammasambuddha said to Ven. Ananda,
"Now, if it occurs to any of you  
'The teaching has lost its authority; we are without a Teacher'
 Do not view it in that way. 
Dhamma & Vinaya I have pointed out & formulated for you,
that will be your Teacher when I am gone."
— DN 16: Mahāparinibbānasutta - The Great Discourse on the Final Unbinding