"Decay is inherent in all component things! Work out your salvation with
diligence!"'.
This was the last word of the Tathāgata. (http://jayarava.org/buddhas-last-words.html)
"From attachment springs grief, from attachment springs fear. From him
who is wholly free from attachment there is no grief, whence then fear?"
Dhp XVI (http://www.accesstoinsight.org/tipitaka/kn/dhp/dhp.16.budd.html)
Story of Parinibbana
http://ignca.nic.in/jatak086.htm
Maha-parinibbana Sutta
http://www.accesstoinsight.org/tipitaka/dn/dn.16.5-6.than.html