Narrated Abu Hurairah: The Messenger of Allah ﷺ as saying: Do not fast one day or two days just before Ramadan, except in the case of a man who has been in the habit of observing the particular fast, for he may fast on that day.
Hadith Referenceسنن ابي داود / كتاب الصيام / 2335
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (1914) صحيح مسلم (1082)