The Prophet (ﷺ) said: One of you should not say: I fasted the whole of Ramadan, and I prayed during the night in the whole of Ramadan. I do not know whether he disliked the purification; or he (the narrator) said: He must have slept a little and taken rest.
Reference: Sunan Abi Dawud 2415 In-book : Book 14, Hadith 103 English translation : Book 13, Hadith 2409
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