There are 200 and according to another riwayah 300 Abdullahs among the Companions. The four of them are famous as “al-'Aba`dila al-Arba'a” which means “The Four Abdullahs”. These are: Abdullah bin Abbas, Abdullah bin Umar, Abdullah bin Zubayr and Abdullah bin Amr bin As (R.A.). After the death of the prophet (PBUH), the opinions of these Companions were taken for the solution of many problems. The subject matters that they agreed on are called “Qawl al-Abadila”.