John Chrysostom

For envy is a fearful, a fearful thing, and persuades men to despise their own salvation. In this way did both Cain destroy himself, and again, before his time, the devil who was the destroyer of his father. So did Saul invite an evil demon against his own soul; and when he had invited, he again envied his physician. For such is the nature of envy; he knew that he was saved, yet he would rather have perished than see him that saved him had in honor. What can be more grievous than this passion? …

Homilies On 2 Corinthians 24.4 ↗