Imaam Ibn Hibbaan (rahimahullaah) said:
It is incumbent on a sensible person to avoid envy in all circumstances, for indeed the most despicable trait of envy is harbouring displeased against Allaah’s decree and wishing to oppose what Allaah (The Exalted) has decided for His slaves. Then the inner self of person is wrapped up in the (desire) to see a Muslim being deprived of a blessing. The soul of the envious person is never at ease nor does his body relax except when he sees his brother being deprived of a blessing.
[Source: Rawdatul Uqalaa’ page 133]