“On the authority of Abu Abdul Rahmaan Abdullah (رضي الله عنه), who said: I heard the Messenger of Allah (صَلَّى ٱللَّٰهُ عَلَيْهِ وَسَلَّمَ) say: ‘Islam is built upon five [pillars]: testifying that there is none worthy of worship except Allah and that Muhammad is the Messenger of Allah, establishing the prayers, giving zakat, making pilgrimage to the House [Kaaba] and fasting the month of Ramadan.’”

Muhammad — Al-Bukhari