There is no envy except in two cases

Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Envy is permissible only regarding two men: a man to whom Allah Almighty has given the knowledge of the Qur'an, and he remains occupied with it; he remains occupied with it, treats its lawful as lawful and its unlawful as unlawful; and a man to whom Allah Almighty has given wealth, and through it he maintains ties with his close relatives and kin, and does deeds of obedience to Allah Almighty."
This narration was recorded by Imam al-Tabarani in al-Mu'jam al-Kabir; its chain contains a narrator, Rawh bin Salah, whom Ibn Adi declared da'if (weak) and Ibn Hibban declared "thiqah" (trustworthy). Imam al-Hakim (may Allah have mercy on him) says: He is thiqah (trustworthy) and ma'mun (reliable).

Sayyiduna Samurah bin Jundub (may Allah be pleased with him) says: The Prophet (peace and blessings be upon him) used to say to us: "In this world, envy is permissible only regarding two men: that a man envies someone to whom Allah Almighty has given much wealth, and that person spends from that wealth (in the way of Allah Almighty) and spends abundantly, so the other person says: 'If I too had wealth, I would also spend it just as this person spends it, and even better,' and in this way he expresses envy of him; and a man who recites the Qur'an and recites it at night in voluntary prayers, and another person who is beside him does not have knowledge of the Qur'an, so he envies him, thinking of how he stands in prayer, and envies him for the knowledge Allah Almighty has given him, and says: 'If Allah Almighty had given me knowledge like his, I too would perform voluntary prayers just as this person performs them.'"
This narration was recorded by Imam al-Tabarani in al-Mu'jam al-Kabir; its chain contains some narrators who have been declared da'if (weak).
This narration was recorded by Imam al-Bazzar with a da'if (weak) chain.

Sayyiduna Yazid bin al-Akhnas (may Allah be pleased with him), who had the honour of being a Companion, narrates that the Prophet (peace and blessings be upon him) said: "Envy is permissible only regarding two kinds of men: a man to whom Allah Almighty has given the knowledge of the Qur'an, and he remains occupied with it night and day and follows the rulings it contains, so a man says: 'If Allah Almighty were to give me what He has given so-and-so, I would remain occupied with it just as this person remains occupied with it'; and a man to whom Allah Almighty has given wealth, and that person spends it and gives charity, so a man (who sees him and envies him) says something similar."
This narration was recorded by Imam al-Tabarani in al-Mu'jam al-Kabir, and its narrators are "thiqat" (trustworthy).

Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Envy is permissible only regarding two kinds of men: a man to whom Allah Almighty has given the Qur'an, and he keeps reciting it night and day, so another man says: 'If I had been given the like of what this person has been given, I would have done just as he does'; and a man to whom Allah Almighty has given wealth, and he spends it in its rightful way, so another person says: 'If I had been given what he has been given, I too would do just as he does.'"
This narration was recorded by Imam Abu Ya'la, and its narrators are the narrators of the "Sahih". Imam al-Bazzar recorded a similar narration.