(Imam Bukhari said that) Ubaidullah bin Musa narrated to us, he said that Hanzalah bin Abi Sufyan informed us, from Ikrimah bin Khalid, from Hazrat Abdullah bin Umar (may Allāh be pleased with both of them), he said that the Messenger of Allāh ﷺ said:

Islam is built on five things: () testifying that there is none worthy of worship besides Allāh, and that Muhammad is the Messenger of Allāh, () establishing prayer, () paying Zakah, () performing Hajj, () and fasting Ramadan.