Syedna Abu Hurairah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: By Him in Whose hand is my soul! You will not enter Paradise until you have faith, and you will not have faith until you love one another. Shall I not tell you something which, if you do it, you will love one another? Spread the greeting of peace among yourselves.

Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) said: Spread peace, feed the people, and thus become brothers to one another, as Allah Almighty has commanded you.

Sayyiduna Bara’ bin Azib (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Spread salam (greetings of peace) generally, you will remain safe; giving preference to only some people (for meeting and greeting) is the worst thing.

Sayyiduna Abdullah bin Salam (may Allah be pleased with him) narrates: When the Noble Prophet (peace and blessings be upon him) arrived in Madinah Munawwarah, people rushed towards him, and I was among them. When I looked closely at his blessed face, I knew that the face of the Prophet (peace and blessings be upon him) could not be the face of a liar. Then the first thing I heard from him was this: The Prophet (peace and blessings be upon him) said: Spread peace, feed others, maintain ties of kinship, and pray at night when people are asleep; you will enter Paradise in peace.

Sayyiduna Zubair bin Al-Awwam (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: The disease of the previous nations will spread among you, and that disease is envy and malice. It is something that shaves off the religion; it does not shave off hair (rather, it destroys the religion). By the One in whose hand is the soul of Muhammad (peace and blessings be upon him)! You cannot be true believers until you love one another. Shall I not tell you something which, if you do it, you will love one another? Spread salam (greetings of peace) among yourselves.

(Second chain) It is stated in this: You cannot enter Paradise until you have faith, and you cannot have faith until you love one another, … .

Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Saying Salam will be the gift of the people of Paradise.

Sayyiduna Abu Umamah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Whoever initiates the greeting of peace will be closer to Allah Almighty and His Messenger.

Sayyiduna Aswad bin Yazid (may Allah be pleased with him) narrates that the prayer had already started in the mosque and we were coming along with Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him). When the people bowed (in ruku'), Sayyiduna Abdullah (may Allah be pleased with him) also bowed and we bowed along with him, even though we were still walking. Meanwhile, a man passed by and said: O Abu Abdur Rahman! As-salamu 'alaykum. Hearing this, Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said in the state of ruku': "Sadaq Allahu wa Rasuluhu" (Allah and His Messenger have spoken the truth). When he finished the prayer, some people asked: When a man greeted you with salam, why did you say that Allah and His Messenger have spoken the truth? He replied: I heard the Noble Prophet (peace and blessings be upon him) say that among the signs of the Hour is that salam will be given only on the basis of acquaintance.

(Second chain) Tariq bin Shihab says: We were sitting with Sayyiduna Abdullah (may Allah be pleased with him) when a man came and said: The iqamah has been called. He stood up and we also stood up. When we entered the mosque, we saw that the people in the front part of the mosque were in the state of bowing (ruku‘). He said "Allahu Akbar" and (before reaching the row) performed ruku‘, and we also performed ruku‘. Then we moved forward in the state of ruku‘ (and stood in the row), and we kept doing as he did. A man passed by in haste and said: Abu Abdur Rahman! Peace be upon you. He replied: Allah and His Messenger have spoken the truth. When we finished the prayer and returned, he went to his family. We sat down and began to say to each other: Did you hear that he replied to that man by saying: Allah has spoken the truth and His Messengers have conveyed (His message)? Who among you will ask him about what he did? Tariq said: I will ask. When he came out, he was asked. In reply, he said that the Noble Prophet (peace and blessings be upon him) said: Before the Day of Judgment, greetings (salaam) will be given only to specific people, and trade will become widespread, to the extent that a wife will help her husband in business matters. Also, severing of family ties, false testimony, concealing true testimony, and writing and reading (will also become common).