Abaadi, the author of Al-Qaamoos (a famous Arabic language dictionary). It was mentioned that a copy of it was found before Al-Fayrooz Abaadi. Moreover, it is not correct to attribute all what is mentioned in that book to Ibn ‘Abbaas for all what is reported from Ibn ‘Abbaas in that book is mainly reported from Muhammad ibn Marwaan As-Suddi As-Sagheer from Muhammad ibn As-Saa'ib Al-Kalbi from Abi Saalih from Ibn ‘Abbaas . Such Isnaad (i.e. chain of narrators) is one of the weakest chains of narrators from Ibn ‘Abbaas to the extent that As-Suyooti described that chain of narrators as "the chain of telling lies." Muhammad Husayn Al-Dhahabi has talked about that book. Amongst his words about it: "It is sufficient for us commenting on that is what was reported from the route of Ibn ‘Abd Al-Hakam who said, 'I have heard Al-Shafi‘i say, 'Nothing was authentically reported from Ibn ‘Abbas regarding Tafsir except about one hundred Ahaadeeth.' This narration, if al-Shafi‘i really said it, indicates the extent of how daring the fabricators were to invent such a huge amount of Tafsir that was attributed to Ibn Abbas. Nothing can prove that better than the apparent contradictions between narrations in that Tafsir attributed to Ibn ‘Abbas and reported from him." [End quote] Allah Knows best. References Sunni tafsir