Are there any written recordings in any branch of Torah where we find a comment proving someone actually died from Kares/Ariri?
Now, of course being a heavenly decree it would be hard to know for sure, but do we find a statement even assuming that this was the case?
Cases where Hashem is said to have been upset and punished someone for a given action, such as Er and Onan, is not what I am looking for, being pre-Har Sinai, and also seemingly not working within the broader, generalized rules.
What I am looking for is a statement along the lines of this person did this forbidden act for which the Torah says one receives kares, and this person actually died from kares.
Midrash and Aggad'ta welcome.