According to Hisham ibn Urwah, he had a circle for teaching in the Prophet's Mosque, which brought followers around him in connection with the Quran.
At the end of his life, Jabir, as an elderly companion, became an important authority for Muhammad's biography and the early history of Islam.
[1] Jabir ibn ʿAbd Allah al-Ansari was born in Yathrib (now known as Medina) 15 years before the Hijra.
After the death of Muhammad, Jaber maintained his credibility, but unlike some of his companions, he was not interested in participating in the political and military activities of that time and was more stable in Medina.
After the migration of the Holy Prophet from Mecca to Medina, Jabir was one of the young people who participated in most of the expeditions and raids.
Jabir's father, Abd Allah ibn Amr ibn Haram al-Ansari was martyred in the Battle of Uhud[3] along with his brother-in-law, Amr ibn al-Jamuh, both having reached nearly 100 years of age.In the 3rd Hijri year before the battle of Zaat al-Raqqa, Jaber married a widow named Sahima, the daughter of Masoud bin Aus, in order to take better care of his nine sisters after the death of his father.
Some time later, on his way back from the Battle of Dhat al-Riqa (4th year of Hijri), Muhammad came to Jabir and politely solved his financial problem.
[2] Jabir narrates, "When the season of plucking the dates came, I went to Allah's Messenger and said, "You know that my father was martyred on the day of Uhud, and he was heavily in debt, and I would like that the creditors should see you."
So when he saw their attitude, he went round the biggest heap of dates thrice, and then sat over it and said, 'O Jabir, call your companions (i.e. the creditors).'
"[4] After Mu'awiya I came to power, he decided to move the pulpit of the Messenger of God from Medina to Damascus (year 50).
According to Imami narrations, 40 days after the event of Ashura, he came to Karbala to visit Hussein bin Ali's shrine and this was considered the first Shia action to hold the Arbaeen ceremony of Hossein as Imam.
[1] In the event of Karbala and the death of Hussain, Jaber bin Abdullah was one of the old men of Medina, and he was concerned about the descendants of the Messenger of God.
Imam Hussain has introduced Jabir as one of the witnesses of his statement in protest against the army of Obaidullah bin Ziyad.
People gathered around him in Damascus and Egypt to learn about Muhammad and his Hadiths.Upon research it is said that he started and carried out the tradition of Arbaeen 1300 years ago.