Cum occasione is an apostolic constitution in the form of a papal bull promulgated by Pope Innocent X in 1653 which condemned five propositions said to have been found in Cornelius Jansen's Augustinus as heretical.

The five errors of Jansen on Grace condemned in Cum occasione are:

Bernard Otten explained, in A manual of the history of dogmas, that the first four of these propositions are absolutely condemned as heretical; while the fifth is condemned as heretical when taken in the sense that Christ died only for the predestined.