Imaam Ibnul Jawzi (rahimahullaah) said: ”Envy is the most despicable Trait.”
Allaah (The Most High) stated:
قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ
Say: “I seek refuge with (Allah) the Lord of the daybreak,
مِن شَرِّ مَا خَلَقَ
“From the evil of what He has created;
وَمِن شَرِّ غَاسِقٍ إِذَا وَقَبَ
And from the evil of the darkening (night) as it comes with its darkness; (or the moon as it sets or goes away).
وَمِن شَرِّ النَّفَّاثَاتِ فِي الْعُقَدِ
“And from the evil of the witchcrafts when they blow in the knots,
وَمِن شَرِّ حَاسِدٍ إِذَا حَسَدَ
“And from the evil of the envier when he envies.
Envy is the most despicable trait. The first deed of disobedience through which Allaah was disobeyed in the heavens was Iblees’s envy towards Aadam and the (first deed of disobedience through which Allaah was disobeyed) in the earth was Qaabil’s envy toward Haabil. 
 [Source: Zaadul Maseer’ by Ibn Jawzi (rahimahullaah)]