´It was narrated that 'Aishah said:` "The Messenger of Allah passed by my door. He said: 'Do you have anything (to eat)?' I said 'I do not have anything.' He said 'Then I am fasting.' Then he passed by my door a second time and we had been given some Hais. I brought it to him and he ate, and I was surprised. I said: 'O Messenger of Allah, you were fasting, then you ate Hais.' He said: 'Yes, O 'Aishah. The one who observes a fast other than in Ramadan, or making up a missed Ramadan, fast, is like a man who allocated some of is wealth to give in charity; if he wishes he may go ahead and give it, and if he wishes he may keep it."'
Hadith Referenceسنن نسائي / كتاب الصيام / 2325
Hadith Gradingالألبانی:حسن | زبیر علی زئی:حسن
Hadith Takhrij«انظر ما قبلہ (حسن)»
Brief Explanation
1؎: From this, the permissibility of breaking a voluntary (nafl) fast is established. It is also understood that if a voluntary fast is broken, making it up (qada) is not obligatory. This is the position of the majority (jumhur) of scholars.