In the name of Allah, the Most Beneficent, the Most Merciful
Anas ibn Malik, RadhiAllahu Anhu, reported: The Prophet, SallAllahu Alayhi Wa Sallam, said:
لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لِأَخِيهِ أَوْ قَالَ لِجَارِهِ مَا يُحِبُّ لِنَفْسِهِ
None of you has faith until he loves for his brother or his neighbor what he loves for himself.
Source: Sahih Muslim 45, Grade: Muttafaqun Alayhi
The purpose is that it is among the obligatory characteristics of faith that a person loves for his believing brother what he loves for himself, and that he hates for him what he hates for himself. If part of that is missing from his faith, then his faith is deficient.
Abu Huraira, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
وَأَحِبَّ لِلنَّاسِ مَا تُحِبُّ لِنَفْسِكَ تَكُنْ مُؤْمِنًا وَأَحْسِنْ جِوَارَ مَنْ جَاوَرَكَ تَكُنْ مُسْلِمًا
Love for the people what you love for yourself and you will be a believer. Behave well with your neighbors and you will be a Muslim.
Source: Sunan Ibn Majah 4217, Source: Sahih
Mu’adh ibn Anas, RadhiAllahu Anhu, reported: He asked the Messenger of Allah, SallAllahu Alayhi Wa Sallam, about virtuous faith. The Prophet, SallAllahu Alayhi Wa Sallam, said:
أَفْضَلُ الْإِيمَانِ أَنْ تُحِبَّ لِلَّهِ وَتُبْغِضَ فِي اللَّهِ وَتُعْمِلَ لِسَانَكَ فِي ذِكْرِ اللَّهِ
The most virtuous faith is to love for the sake of Allah, to hate for the sake of Allah, and to work your tongue in the remembrance of Allah.
Mu’adh, RadhiAllahu Anhu, said, “How is it, O Messenger of Allah?” The Prophet, SallAllahu Alayhi Wa Sallam, said:
وَأَنْ تُحِبَّ لِلنَّاسِ مَا تُحِبُّ لِنَفْسِكَ وَتَكْرَهَ لَهُمْ مَا تَكْرَهُ لِنَفْسِكَ وَأَنْ تَقُولَ خَيْرًا أَوْ تَصْمُتَ
That you love for the people what you love for yourself, and you hate for the people what you hate for yourself, and you speak goodness or remain silent.
Source: Musnad Ahmad 21627, Grade: Hasan
Khalid ibn Abdullah, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said to his grandfather:
أَتُحِبُّ الْجَنَّةَ
Do you love Paradise?
He said, “Yes.” The Prophet, SallAllahu Alayhi Wa Sallam, said:
فَأَحِبَّ لِأَخِيكَ مَا تُحِبُّ لِنَفْسِكَ
Then love for your brother what you love for yourself.
Source: Musnad Ahmad 16219, Grade: Sahih li ghayri
Abdullah ibn Amr, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
مَنْ أَحَبَّ أَنْ يُزَحْزَحَ عَنْ النَّارِ وَيَدْخُلَ الْجَنَّةَ فَلْتُدْرِكْهُ مَنِيَّتُهُ وَهُوَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ وَيَأْتِي إِلَى النَّاسِ مَا يُحِبُّ أَنْ يُؤْتَى إِلَيْهِ
Whoever would love to be delivered from the Hellfire and entered into Paradise, then let him die with faith in Allah and the Last Day, and let him treat the people the way he would love to be treated.
Source: Sahih Muslim 1844, Grade: Sahih
Abu Dharr, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
يَا أَبَا ذَرٍّ إِنِّي أَرَاكَ ضَعِيفًا وَإِنِّي أُحِبُّ لَكَ مَا أُحِبُّ لِنَفْسِي لَا تَأَمَّرَنَّ عَلَى اثْنَيْنِ وَلَا تَوَلَّيَنَّ مَالَ يَتِيمٍ
O Abu Dharr, verily, I see you as weak and I love for you what I love for myself. Do not command even two people and do not manage the property of an orphan.
Source: Sahih Muslim 1826, Grade: Sahih
Indeed, the Prophet only prohibited him from that because he viewed him as weak and he liked that for every weak person. He would only entrust with authority over people those whom Allah had given strength to do it. He would command them to call people to obedience for Allah and he would entrust them with managing the affairs of their religion and worldly life.
Success comes from Allah, and Allah knows best.