(salam) (bismillah) Is there any historical documentation on the issue that proves that Imam Ali (a.s) praised Usman on his attempts to collect and compile holy Quran? I was reading a Urdu book on investigation of different aspects of Tehreef e Quran in the following link. http://maaref-foundation.com/urdu/quran/important_facts/index.htm Where i read that Imam Ali a.s praised attempts of Usman of compiling Quran.