Abu Humaid Sa'idi reported:I came to Allah's Messenger (ﷺ) with a cup of milk from Naqi' which had no cover over it, whereupon he said: Why did you not cover it? - even if you had covered it only with a stick. Abu Humaid said that he had been ordered that waterskins be tied during the night, and the doors be closed during the night

Abu Humaid Sa'idi reported through another chain of transmitters that he brought to Allah's Messenger (ﷺ) a cup containing milk, but there is no mention of the word" in the night