Rabi'a bin Yazid al-Damashqi ربيعة بن يزيد الدمشقي · The Book of Salah

"A man from the people of Najd came to the Messenger of Allah (ﷺ) with unkempt hair. We could hear him talking loudly but we could not understand what he was saying until he came closer. He was asking about Islam. The Messenger of Allah (ﷺ) said to him: 'Five prayers each day and night.' He said: 'Do I have to do anything else' He said: 'No, unless you do it voluntarily.' He said: 'And fasting the month of Ramadan.'…