Translation:People with a lot of sins will enter hell.
"Aku punya banyak apel" ==> this is correct.
"Aku banyak apel"==> this is not correct.
In such a sentence you need a verb to show possession.
If you don't want use a verb, you can say it like this :
"Apelku banyak" ==> My apples are a lot.
It's informal, it's a very direct and straightforward sentence in Indonesian.
It just doesn't translate well into another language.
I can remember a similar sentence in this course, and the sentence discussion is full of complaints.