I am not concerned if the book of Sufyaan was stolen from me, for indeed I have memorised it all.
From amongst the most amazing of those who memorised [knowledge] in our time was Ibn Taymiyyah; He would read a book only once and it would be etched in his mind (i.e. he would have memorised it).
Abu ‘Amr al-‘Alaa’s home was full of books. So when his house burnt down, all that we took from him (in terms of knowledge) thereafter until he died was from his memory
From amongst the people of al-Basrah, Qataadah was the best at memorising; whatever he heard, he would memorise. The book “Saheefatu-Jaabir” was read to him [only] once and he memorised it [all].
I have in my house [something] I wrote 50 years [ago] and have not read it since I [first] wrote it. Certainly, I know which book it is in, [and] which page it is on [and] which line it is on
Because I have fond memories of it (the University) from the days when I was a teacher there.