Abu Umamah reported: The Messenger of Allah, peace and blessings be upon him, said:

مَنْ أَحَبَّ لِلَّهِ وَأَبْغَضَ لِلَّهِ وَأَعْطَى لِلَّهِ وَمَنَعَ لِلَّهِ فَقَدْ اسْتَكْمَلَ الْإِيمَانَ

Whoever loves for the sake of Allah, hates for the sake of Allah, gives for the sake of Allah, and withholds for the sake of Allah has perfected the faith.

Source: Sunan Abu Dawud 4681, Grade: Sahih

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Mu’adh ibn Anas reported: The Messenger of Allah, peace and blessings be upon him, said:

أَفْضَلُ الْإِيمَانِ أَنْ تُحِبَّ لِلَّهِ وَتُبْغِضَ فِي اللَّهِ وَتُعْمِلَ لِسَانَكَ فِي ذِكْرِ اللَّهِ

The best 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 said, “What is it, O Messenger of Allah?” The Prophet 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 that you speak goodness or remain silent.

Source: Musnad Ahmad 21627, Grade: Hasan

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Ibn Rajab said:

  قَالَ بَعْضُ الصَّالِحِينَ مِنَ السَّلَفِ أَهْلُ الْمَحَبَّةِ لِلَّهِ نَظَرُوا بِنُورِ اللَّهِ وَعَطَفُوا عَلَى أَهْلِ مَعَاصِي اللَّهِ مَقَتُوا أَعْمَالَهُمْ وَعَطَفُوا عَلَيْهِمْ لِيُزِيلُوهُمْ بِالْمَوَاعِظِ عَنْ فِعَالِهِمْ وَأَشْفَقُوا عَلَى أَبْدَانِهِمْ مِنَ النَّارِ وَلَا يَكُونُ الْمُؤْمِنُ مُؤْمِنًا حَقًّا حَتَّى يَرْضَى لِلنَّاسِ مَا يَرْضَاهُ لِنَفْسِهِ

Some of the righteous predecessors said: The people who love Allah look by the light of Allah, and they are compassionate with those who disobey Allah. They hate their actions but show mercy to them so that through their admonitions they might leave their actions. They are afraid that the Hellfire will consume their bodies. The believer will not truly be a believer until he is pleased for people to have what he is pleased for himself.

Source: Jami’ Ulum wal-Hikam 13

An-Nawawi said:

 يشمل الكافر والمسلم فيحب لأخيه الكافر مايحب لنفسه من دخوله في الإسلام كما يحب لأخيه المسلم دوامه على الإسلام ولهذا كان الدعاء بالهداية للكافر مستحبا والمراد بالمحبة إرادة الخير والمنفعة ثم المراد المحبة الدينية لا المحبة البشرية

A Muslim should love for his brother, the disbeliever, what he loves for himself which is his entering Islam, just as he should love for his brother Muslim that he remains in Islam. For this reason, it is recommended to supplicate for the disbeliever to be guided. The meaning of love here is an intention for good and benefit, and this meaning is religious love, not human love.

Source: Sharh Arba’een An-Nawawi

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Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said:

أَحْبِبْ حَبِيبَكَ هَوْنًا مَا عَسَى أَنْ يَكُونَ بَغِيضَكَ يَوْمًا مَا وَأَبْغِضْ بَغِيضَكَ هَوْنًا مَا عَسَى أَنْ يَكُونَ حَبِيبَكَ يَوْمًا مَا

Love your beloved moderately, for perhaps he will become hateful to you someday. Hate the one you hate moderately, for perhaps he will become your beloved someday.

Source: Sunan At-Tirmidhi 1997, Grade: Sahih

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Zaid ibn Aslam reported: Umar ibn Al-Khattab, may Allah be pleased with him, said:

لا يَكُنْ حُبُّكَ كَلَفًا وَلا بُغْضُكَ تَلَفًا

Let not your love be infatuation and let not your hatred be destruction.

It was said, “How is this?” Umar said:

إِذَا أَحْبَبْتَ كَلِفْتَ كَلَفَ الصَّبِيِّ وَإِذَا أَبْغَضْتَ أَحْبَبْتَ لِصَاحِبِكَ التَّلَفَ

When you love someone, you become infatuated like a child. When you hate someone, you love destruction for your companion.