Mu’adh bin Jabal (may Allah be pleased with him) narrates: I heard the Messenger of Allah (peace and blessings be upon him) say:“Allah the Exalted says: For those who love each other for My sake, meet each other for My sake, and spend on each other for My sake, My love becomes obligatory.”(Malik) And in the narration of Tirmidhi, it is stated:“Allah the Exalted says: For those who love each other for the sake of My majesty and greatness, there are pulpits of light, which even the Prophets and martyrs will envy.”Sahih, narrated by Malik and al-Tirmidhi.

Umar (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Among the servants of Allah are some people who are neither prophets nor martyrs, but on the Day of Resurrection, even the prophets and martyrs will envy their rank and status with Allah." The companions (may Allah be pleased with them) asked: O Messenger of Allah! Please tell us who these people are. He (peace and blessings be upon him) said: "They are those who love one another not because of any family relationship nor because of any financial dealings, but they love and interact with each other solely for the sake of Allah and in obedience to the Qur'an. By Allah! Their faces will be radiant and they will be upon pulpits of light. When others will be afraid, they will not fear, and when others will be grieved, they will not grieve." Then he (peace and blessings be upon him) recited this verse: "Behold! Indeed, there will be no fear upon the friends of Allah, nor will they grieve." Hasan, narrated by Abu Dawood.

And he (Imam Baghawi) narrated it in Sharh al-Sunnah with the wording of Misbahih through the chain of Abu Malik with some additions, and likewise it is also in Shu'ab al-Iman. Hasan, narrated in Sharh al-Sunnah, Misbahih al-Sunnah, and al-Bayhaqi in Shu'ab al-Iman.

Ibn Abbas (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said to Abu Dharr (may Allah be pleased with him): "Abu Dharr! Which part (aspect) of faith is the strongest and most firm?" He replied, "Allah and His Messenger know best." The Prophet (peace and blessings be upon him) said: "Loving and supporting each other for the sake of Allah, loving for the sake of Allah, and harboring aversion for the sake of Allah." Weak, narrated by Al-Bayhaqi in Shu'ab al-Iman.

It is narrated from Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "When a Muslim visits his (Muslim) brother who is ill or meets him, Allah Almighty says: Your life in the Hereafter has become good, your walking has become good, and you have made a place for yourself in Paradise." (Tirmidhi), and he said: This hadith is gharib. Its chain is weak. Narrated by al-Tirmidhi.

Miqdam bin Ma’dikarib, may Allah be pleased with him, narrates from the Prophet, peace and blessings be upon him, that he said: "When a man loves his (Muslim) brother, he should inform him that he loves him." Its chain is good. Narrated by Abu Dawood and Tirmidhi.

Anas (may Allah be pleased with him) narrates: A man passed by the Prophet (peace and blessings be upon him) while some people were with him. One of those people said: I love this person for the sake of Allah. The Prophet (peace and blessings be upon him) said: "Have you informed him?" He replied: No. The Prophet (peace and blessings be upon him) said: "Go to him and tell him." So he went to that person and told him (that I love you for the sake of Allah). He replied: May the One for whose sake you love me, love you in return. The narrator states: Then that man returned, and the Prophet (peace and blessings be upon him) asked him, so he informed him of the reply. The Prophet (peace and blessings be upon him) said: "You will be with the one whom you love, and you will receive the reward you desired." (Bayhaqi in Shu'ab al-Iman). And in the narration of Tirmidhi: "A person will be with whom he loves, and he will receive the recompense for what he has done." Its chain is weak, narrated by al-Bayhaqi in Shu'ab al-Iman and al-Tirmidhi.

It is narrated from Abu Sa'id (may Allah be pleased with him) that he heard the Prophet (peace and blessings of Allah be upon him) say: "You should only keep the company of a believer, and only a pious person should eat your food." Its chain is authentic. Narrated by al-Tirmidhi, Abu Dawood, and al-Darimi.

Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "A man is upon the religion of his friend, so each of you should look at whom he befriends." Ahmad, Tirmidhi, Abu Dawood, Bayhaqi in Shu'ab al-Iman. And Imam Tirmidhi (may Allah have mercy on him) said: This hadith is hasan ghareeb, and Imam Nawawi (may Allah have mercy on him) said: Its chain of narration is authentic. Hasan, narrated by Ahmad, Tirmidhi, Abu Dawood, and Bayhaqi in Shu'ab al-Iman.

Yazid bin Ni‘amah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When a man establishes brotherhood with another man, he should ask him about his name, his father's name, and his tribe, because this increases love (friendship)." Its chain is weak. Narrated by al-Tirmidhi.