Imam Bukhari, whose full name is Muhammad ibn Ismail ibn Ibrahim ibn al-Mughirah al-Ja'fi al-Bukhari. He was the first to compile a book solely on authentic Hadiths. He named it "Al-Jami' al-Sahih" (The Authentic Compilation) because it includes the sayings, actions, and approvals of the Prophet Muhammad (peace be upon him), as well as the days of his life. Imam Bukhari paid meticulous attention to his compilation, demonstrating great care and precision in its composition.