Harun bin 'Abdullah al-Hamal هارون بن عبد الله بن مروان الحمال · The Book of Fasting

"Someone who heard it from Jabir told me something similar."

he asked the Messenger of Allah about fasting while traveling. He said: "If," then he said something to the effect that: "If you want, then fast, and if you want, then do not fast.

"The Messenger of Allah said: 'The one who fasts every day of his life has neither fasted, nor broken the 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 has not fasted."