Narrated Muslim al-Qurashi: I asked or someone asked the Prophet ﷺ about perpetual fasting. He replied: You have a duty to your family. Fast during Ramadan and the following month, and every Wednesday and Thursday. You will then have observed a perpetual fast.
Hadith Referenceسنن ابي داود / كتاب الصيام / 2432
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:ضعيف, إسناده ضعيف, ترمذي (748), عبيداللّٰه بن مسلم: مجهول،انظر التحرير (6636), انوار الصحيفه، صفحه نمبر 90
Hadith Takhrij« سنن الترمذی/الصوم 45 (748)، (تحفة الأشراف: 9740)، وقد أخرجہ: مسند احمد (3/416، 4/78) (ضعیف) » (صحیح مسلم بن عبیداللہ ہے اور یہ لین الحدیث ہیں، ان کے والد کا نام عبیداللہ بن مسلم اور یہ صحابی ہیں)
´Ubaidullah (bin Muslim) Al-Qurashi narrated from his father who said:` "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).'"
Shaykh Dr. Abdur Rahman Freywai
Commentary: Note: (The authentic chain is as follows: "From Muslim bin Ubaydullah, from his father Ubaydullah bin Muslim." Muslim bin Ubaydullah is weak in hadith, and his father "Ubaydullah bin Muslim" is a Companion [sahabi].)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 748