deathbed
noun /ˈdeθbed/
  /ˈdeθbed/
[usually singular]- the bed in which somebody is dying or dies
- a deathbed confession/conversion
 - He told me the truth on his deathbed (= as he lay dying).
 - She was on her deathbed (= going to die very soon).
 - (humorous) You'd have to be practically on your deathbed before the doctor would come and see you!
 
Oxford Collocations DictionaryDeathbed is used before these nouns:- confession
 - conversion
 - repentance
 - …