Pride goes before a fall.

listen to the pronunciation of Pride goes before a fall.
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Alternative form of pride comes before a fall
(Atasözü) (American) also Pride comes before a fall. (British & Australian) something that you say which means if you are too confident about yourself, something bad will happen to show you that you are not as good as you think you are

Just because you did well in your exams doesn't mean you can stop working. Pride comes before a fall.