Allah preserved the meaning of the Quran by explaining some of its generalities within the Quran itself and by entrusting the Tafseer (explanation) of the remainder to His final Messenger, Muhammad .

I have 3 questions. I read tafsir ibn kathir which states a hadith which is "whoever explains the Quran with his opinion or with what he has no knowledge of, then let him assume his seat in the fire" ...

This is a tafseer (exegesis) with translation. Though Moulvi Abdul Haq had doubts about its year of calligraphy, Dr Sualeha in her book Quran-i-Hakeem Ke Urdu Tarajim’ (Qadeemi Kutub Khana ...