al-Mughira bin Maqsam المغيرة بن مقسم · The Book of Fasting

the Messenger of Allah was asked about his fasting and he got angry. 'Umr said: "We are content with Allah as our lord, Islam as our religion and Muhammad as or Prophet." And he was aksed about someone who fasted for the rest of his life and said: "He neither fasted nor broke his fast." 'Ata said: "someone who heard him told me that Ibn 'Umar (said) that the Prophet said: 'Whoever fasts every day of his life, then he…

"O Messenger of Allah, I am a man who fasts continually: shoud I fast when traveling?" He said: "Fast if you wish and break you fast if you wish." 'Ata said: "someone who heard him told me that Ibn 'Umar (said) that the Prophet said: 'Whoever fasts every day of his life, and then he has not fasted."