Muwatta Malik 669
موطأ مالك#669SahihYahya related to me from Malik from Nafi from Abdullah ibn Umar that the Messenger of Allah, may Allah bless him and grant him peace, forbade fasting for two days or more without breaking the fast in between. They said, "But Messenger of Allah, you practise wisal." He replied, "I am not the same as you. I am fed and given to drink
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliSahih
In-book reference: 18:40