Narrated Abu Hurayrah: "The Prophet (peace be upon him) said: 'Avoid envy, for envy devours good deeds just as fire devours fuel or (he said) grass.'"
(Sunan Abu Dawud)
Salim narrated on the authority of his father (Ibn 'Umar) that the Apostle of Allah (may peace be upon him) said: "Envy is not justified but in case of two persons only: one who, having been given (knowledge of) the Qur'an by Allah, recites it during the night and day (and also acts upon it) and a man who, having been given wealth by God, spends it during the night and the day (for the welfare of others. seeking the pleasure of the Lord)."
(Sahih Bukhari and Muslim)