English translation
2388. It was narrated that 'Amr bin Shurahbīl said: "A man came to the Messenger of Allāh ﷺ and said: 'O Messenger of Allāh, what do you say about a man who fasted for the rest of his life?' The Messenger of Allāh ﷺ said: 'I wish that he would never eat for the rest of his life.' He said: 'Two-thirds (of a lifetime)?' He said: 'That is too much.' He said: 'Half?' He said: 'That is too much.' He said: 'Shall I not tell you of that which will take away impurity from the heart?' He said: 'Yes.' He said: 'Fasting for three days each month.'" (Sahih)
