It is narrated from Urwah bin al-Zubayr, concerning the names of the Companions who took part in the Pledge of al-Aqabah, that from Banu Ghanm bin Malik bin al-Najjar was Sayyiduna Abu Ayyub (may Allah be pleased with him), whose name is Khalid bin Zayd bin Kulayb. Likewise, among the names of the Companions from Banu al-Najjar who took part in the Battle of Badr with the Messenger of Allah (peace and blessings be upon him), Sayyiduna Abu Ayyub (may Allah be pleased with him) is also mentioned, whose full name is Khalid bin Zayd bin Kulayb bin Tha'labah.

It is narrated from Abu Imran al-Tujibi: We made an expedition against Constantinople in the company of Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him). We formed rows there so long that I had never seen the like before. Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) passed away during this very campaign. He had made a bequest that he be buried at the foot of the wall of Constantinople and that his debt be paid off, and so it was done.

It is narrated from Muhammad bin Umar (al-Waqidi) that the Messenger of Allah (peace and blessings be upon him) established brotherhood between Sayyiduna Abu Ayyub al-Ansari and Sayyiduna Mus'ab bin Umayr (may Allah be pleased with them both). Sayyiduna Abu Ayyub (may Allah be pleased with him) took part in the Battles of Badr, Uhud and al-Khandaq, and in all the campaigns alongside the Messenger of Allah (peace and blessings be upon him). He passed away during the caliphate of Sayyiduna Mu'awiyah (may Allah be pleased with him), in the year 52 AH, at the time when Yazid bin Mu'awiyah campaigned against Constantinople. His grave is at the foot of the fortress of Constantinople in the land of the Romans. It is mentioned regarding it that people visit it frequently, repair it, and when drought strikes, they pray for rain (from Allah) through it.