وَعَنْهُ قَالَ: جَاءَ أَبُو حُمَيْدٍ رَجُلٌ مِنَ الْأَنْصَارِ مِنَ النَّقِيعِ بِإِنَاءٍ مِنْ لَبَنٍ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَلَّا خَمَّرْتَهُ وَلَوْ أنْ تعرِضَ عليهِ عوداً»
He told that when Abu Humayd, one of the Ansar, brought a vessel of milk to the Prophet (sallallahu alayhi wa sallam) from an-Naqi* the Prophet (sallallahu alayhi wa sallam) said, “Why did you not cover it up, even by putting a piece of wood on it?” *A place in the wadi al-Aqiq where camels which had been given in sadaqa were kept.
Mishkat al-Masabih 4123, Book 22, Foods, Hadith 131. 1 min read