Wiktionary
pride comes before a fall
prov. A person who is extremely proud of his or her ability will often suffer a setback or failure, because he or she tends to be overconfident and to make errors of judgment.
Usage examples of "pride comes before a fall".
He's proud to the point of being arrogant (remember that, especially in medieval literature, pride comes before a fall), he's aware of his attractiveness, he's intelligent and sly, he is full of joy and life.
I the Lord thy God am a jealous God, pride comes before a fall, etc.