Hadith expert Abdullah bin Umar Radhiyallahu 'anhu..
The next most reported person after Abu Hurairah was Abdullah bin Umar. He narrated 2,630 hadiths.
Abdullah is the son of the second caliph Umar bin al-Khatthab, the biological sister of Sayyidah Hafshah Ummul Mu'minin. He is one of the people named Abdullah (Al-Abadillah al-Arba'ah) who is famous as a fatwa giver. The other three are Abdullah bin Abbas, Abdullah bin Amr bin al-Ash and Abdullah bin az-Zubair.
Ibn Umar was born not long after the Prophet was sent. He was 10 years old when he joined his father. Then, ahead of his father, he emigrated to Medina. At the time of the battle of Uhud he was still too young to take part in the war. And don't allow it. But after the end of the Uhud war he took part in many wars, such as the Qadisiyah war, Yarmuk, the conquest of Africa, Egypt and Persia, as well as the invasion of Basrah and Madain.
Az-Zuhri never left the opinion of Ibn Umar to turn to the opinion of others. Imam Malik and az-Zuhri said: "Indeed, none of the affairs of the Messenger of Allah and his companions were hidden from Ibn Umar". He narrated hadiths from Abu Bakr, Umar, Uthman, Sayyidah Aisyah, his sister Hafshah and Abdullah bin Mas'ud. There are many narrators from Ibn Umar, including Sa'id bin al-Musayyab, al Hasan al Basri, Ibn Shihab az-Zuhri, Ibnu Sirin, Nafi', Mujahid, Thawus and Ikrimah.
He died in 73 H. Some say that Al-Hajjaj infiltrated someone into his house and then killed him. It is said that he was first poisoned, then speared and then hacked. Another opinion says that Ibn Umar died naturally.
The most authentic Sanad that comes from Ibn Umar is the so-called Silsilah adz-Dzahab (golden genealogy), namely Malik, from Nafi', from Abdullah bin Umar. While the most Dlaif: Muhammad bin Abdullah bin al-Qasim from his father, from his grandfather, from Ibn Umar.
Copied from the Biography of Ibn Umar in Al-Ishabah no.4825 and Tahdzib al-Asma' 1/278, Thabaqat Ibn Sa'ad 4/105