Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Envy is not permissible towards anyone except two persons: a man whom Allah has taught the Qur'an, and he recites it in the hours of the night and the day; his neighbour hears him and says: 'Would that I were given what so-and-so has been given, then I would act as he acts.' And a man to whom Allah has given wealth, and he keeps spending it where it is due (in the right); then a man says: 'Would that I were given the like of what so-and-so has been given, then I would act as he acts.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7827