Interpretation and teaching
He became renowned for explaining Qur’anic passages, language, and legal questions. Students including Mujahid and Ikrima helped transmit the teaching associated with him.
Source: TDV Encyclopaedia of Islam — Abdullah ibn Abbas
Evaluating attributed material
Ibn Abbas also participated in public life during the first civil war and later lived in the Hijaz. Many later reports bear his name, but each chain and attribution requires assessment rather than automatic acceptance.
Source: TDV Encyclopaedia of Islam — Abdullah ibn Abbas