Biography of Hadith Scholar Abdullah bin Mas'ud Radhiyallahu 'anhu
His full name is Abdullah bin Mas'ud bin Ghafil al-Hudzali.
His nickname is "Abu Abdirahman". He was the sixth friend who was the first to convert to Islam.
He migrated to Abyssinia twice, and followed all the wars with the Messenger of Allah, may God bless him and grant him peace. In the battle of Badr, he succeeded in killing Abu Jahl.
The Messenger of Allah, peace and blessings be upon him, said: "Take the Qur'an from four people: Abdullah, Salim (sahaya Abu Hudzaifah), Muadz bin Jabal and Ubay bin Ka'ab". According to the hadith experts, if "Abdullah" is mentioned, what is meant is this Abdullah bin Mas'ud.
When he became Caliph Umar appointed him as Judge and Manager of the national treasury in Kufa. It is a symbol of piety, prudence, and self-purity.
The most authentic sanad that comes from him is the one narrated by Sufyan at-Tsauri, from Manshur bin al-Mu'tamir, from Ibrahi, from alqamah. While the most dlaif is the one narrated by Shuraik from Abi Fazarah from Abu Said.
He narrated a hadith from Umar and Sa'ad bin Mu'adz. Those who narrated the hadith from him are Al-Abadillah ("Four people named Abdullah"), Anas bin Malik, Jabir bin Abdullah, Abu Musa al-Ash'ari, Alqamah, Masruq, Shuraih al-Qadli, and several others. The number of hadiths he narrated reached 848 hadiths.
He came to Medina and became ill there, then died in 32 AH and was buried in Baqi, Uthman bin 'Affan joined in praying for him.
Copied from: Biography of Ibn Mas'ud in Al-Ishabah: Ibn Hajar Asqalani no.4945