In Ramadan, if one becomes junub at night but does not make ghusl before morning adhān inadvertently
Fast Invalidators
To Remain Junub until Morning Adhān
In Ramadan, if one becomes junub at night but does not make ghusl before morning adhān inadvertently, e.g. he becomes junub in sleep and wakes up after morning adhān, his fast is in order.
Source: Hadana adopted from the Istiftaat of the Grand Ayatollah Khamenei