THE LAST WORD
VI. 10. Then the Blessed One addressed the brethren, and said, ‘Behold now, brethren, I exhort you, saying, “Decay is inherent in all component things! Work out your salvation with diligence!”‘ This was the last word of the Tathâgata!
Buddhist Suttas – MAHÂ-PARINIBBÂNA-SUTTANTA
Translated from Pâli by T. W. Rhys Davids [1881]
http://www.sacred-texts.com/bud/sbe11/sbe1103.htm