what is the last orginal quote of buddha and what is the meaning of that quote? what is the last orginal quote  of buddha and what is the meaning of that quote ?
I have read the story of Buddha that    he passed away  by someone posioning him
From the Mahaparinibbana Sutta:

And the Blessed One addressed the bhikkhus, saying: &quot;Behold now,
bhikkhus, I exhort you: All compounded things are subject to vanish.
Strive with earnestness!&quot;
This was the last word of the Tathagata.

The footnote states:

Handa dani bhikkhave amantayami vo: Vayadhamma sankhara appamadena
sampadetha. Earnestness (appamada) is explained as &quot;presence of
mindfulness.&quot; Comy.: &quot;'You should accomplish all your duties without
allowing mindfulness to lapse!' Thus did the Blessed One, while on the
bed of his Parinibbana, summarize in that one word on earnestness the
advice he had given through forty-five years.&quot;

And from another translation:

Then the Gracious One addressed the monks, saying: “Come now, monks,
for I tell you all conditioned things are subject to decay, strive on
with heedfulness!” These were the last words of the Realised One.

Regarding the alleged poisoning, you can read it here from the same sutta.