Ubaidullah bin Musa bin Abi al-Mukhtar عبيد الله بن موسى بن أبي المختار باذام · The Book on Fasting

"The Messenger of Allah would fasting during the beginning of every month for three days, and Friday was the least of the days that he did not fast."

"I asked - or; the Prophet was asked - about fasting daily. So he said: 'Your family has a right over you.' Then he said: 'Fast Ramadan and that which is after it, and every Wednesday and Thursday. If you do that, then you will have fasted daily, as well as broken (the fast).'"