Chapter 1 has no such scenario
Chapter 2 has three which are almost alike in meaning. They are 2/48, 2/123 and 2/254. They say:
a. Be aware of a day (wa attaqoo yawma)
b. No nafs will avail another for any thing
c. No intercession be accepted
d. No ransom (equalisation, 3adlun)
e. No help conferred.
This makes me wonder as in some scenarios, believers are helped. Or perhaps that does not count as help?