The Banu Kalb (Arabic: بنو كلب) was one of the tribes of Arabia during Muhammad's era.The Banu Kalb claimed descent from the Yemenites. The Quraish led a propaganda campaign against the Prophet in order to gain allies and incite hatred towards. By sending out expeditions, it would weaken the enemy and refute the propaganda.
Abdur Rahman bin Awf was sent to Dumatul Jandal to invite them to Islam. He stayed there for three days performing dawah work which resulted their chief, Asbagh bin 'Amr Kalbi, who was a Christian at that time, to embrace Islam. Soon after that, the majority followed him by embracing Islam.
Banu Kalb thought nowadays exist by majority in North-west Syria especially in Homs and Qardaha.
Fatimah Kalbiyyah was a sacred woman, born in AH 5, according to Muslim Lunar calendar. She belonged to the powerful and main Arab tribe of Banu Kalb. She loved the Children of Fatimah Zaharaa, daughter of Muhammad the messenger of God, from her heart. She requested her husband Ali Ibn-e Abee Talib, not to call her Fatimah after her marriage to him, partly because of sanctity she bore for Fatima tuz-Zehra, and partly because it evoked the grief in the hearts of children of Bibi Fatema tuz-Zehra. Fatimah bint Hizam al-Qilabiyya, commonly known as Umm ul-Banin ("mother of several sons"), married Ali (Ali ibn Abi Talib), after the death of his first wife Fatimah. Ummul Banin and Ali had four sons, of which the eldest was Al-Abbas ibn Ali (the commander of Husayn ibn Ali's forces at the Battle of Karbala). Also Uthman ibn Ali who was martyred at the battle. Her two other sons were Abdullah ibn Ali and Jafar ibn Ali. She inspired and educated her own children to understand the fact, that they were slaves to Imam Husain. Her sons never claimed to be brothers of Husain, rather claimed to be his slaves, as their mother wished. She died at the youthful age of 59 lunar years in year 64 AH. She was the first one to hold a congregation [Majlis] for Imam Husain bin Ali right after his martyrdom. She was a poetess, and wrote the first latmiyyah in his honor.
Zayd ibn Harithah was an Arab from the tribe of Banu Kalb who was captured as a boy and brought to Makkah to be sold in the slave market. He was bought by Khadijah's nephew and put in her service. In Khadijah's household, Zayd became attached to Muhammad (SAW) and devoted himself to his service. Their relationship was like that of a son to a father. Indeed when Zayd's father came to Makkah in search of him, Zayd was given the choice by Muhammad (SAW) of either going with his father or staying with him. Zayd's reply to his father was:
"I shall never leave this man. He has treated me nobly, as a father would treat his son. Not a single day have I felt that I am a slave. He has looked after me well. He is kind and loving towards me and strives for my enjoyment and happiness. He is the most noble of men and the greatest person in creation. How can I leave him and go with you?...I shall never leave him." Later, in public Muhammad (SAW) proclaimed the freedom of Zayd. However, Zayd continued to live with him as part of his household and devoted himself to his service.
It is narrated in Sahih Bukhari and Muslim that Gabriel came to the Prophet while Umm Salama was present. Gabriel started talking (to the Prophet and then left. The Prophet said to Um Salama, "(Do you know) who it was?" (or a similar question). She said, "It was Dihya (a handsome person amongst the companions of the Prophet)." Later on Um Salama said, "By Allah! I thought he was none but Dihya, till I heard the Prophet talking about Gabriel in his sermon."
Basically they would resemble each other a lot. e.g. In dress:
Malik said: Jibril was seen in the image of (the Companion) Dihya (ibn Khalifa) al-Kalbi, and he was wearing a turban with its extremity hanging between his shoulder-blades. (a handsome person amongst the companions of the Prophet)." Later on Um Salama said, "By Allah! I thought he was none but Dihya, till I heard the Prophet talking about Gabriel in his sermon."
According to a hadith by the Holy Prophet the mother of the sufyani will also belong to some of the clans of the tribe of Banu kalb and will also have some of their support