I was ill for 2 years, and when I got better, I read the Qur.aan [from memory] and I did not make a single mistake.
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
I have written [ahaadeeth] from more than 1,000 Shaykhs, and from each one I have [taken] 10,000 ahaadeeth; There is nothing I have except that I recall its isnaad.
I have not heard a man narrate hadeeth except that I know more about it than him; [however] I had forgotten some knowledge if a man was to memorise that he would be an ‘aalim.