Wiktionary
death bed
n. (alternative spelling of deathbed English)
Usage examples of "death bed".
High-and-Michael wants you there for the evening run-through even if you're on your death bed.
It was like he knew he would never see her again, that Anse Bundren was driving him from his mother's death bed, never to see her in this world again.
You can change at anytime in your life, even on your death bed, but it is harder if you haven't had much practice self-changing earlier in life.