It is amazing, the extensive effort, dedication, patience, sincerity, and intellect that was invested in authenticating the Sunnah. Its text is preserved as pure and original as the day it was revealed more than 1400 years ago.
Hadith have passed through several stages of compilation starting from the lifetime of Prophet Muhammad (PBUH) til the third Hijri Century.
Muslims have developed a set of rules and conditions to check the authenticity of a hadith and trace it back to its origin. This science has been known in Islamic studies as ‘The Science of Hadith’ which is taught all over the Islamic world.