In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Ash-Shabee – may Allah have mercy on him – said:

Abu Salama, may Allah have mercy upon him, used to argue with Ibn Abbas, may Allah be pleased with him and his father, and as result he was deprived of a lot of knowledge (1) and deprived of benefiting from him. Indeed, Abu Salama acknowledged this, expressed grief over his behaviour and regretted what emanated from it. In the latter (years) of his life, he said:

“If I had been gentle with Ibn Abbas, I would have acquired a lot of knowledge from him”. (2)

[1] Jami Bayan Al-Ilm 1/521
[2] Sunan Ad-Darimi 1/394