Imran b. Husain (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) said to him (or he said to another person and he was listening to it):
O, so and so, did you observe fast in the middle of the month? He said: No. Thereupon he (the Messenger of Allah) said: When you break it, then observe fast for two days.
Reference: Sahih Muslim 1161 a In-book : Book 13, Hadith 251 USC-MSA web (English) : Book 6, Hadith 2601 (deprecated)
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