رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 764
The Book About the Etiquette of Eating
Undesirability of Blowing into the Vessel while Drinking
عَنْ أبى سَعِيدٍ الخدرى رضى اللَّه عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ نَهَى عَنْ النَّفْخِ فِي الشَّرَابِ، فَقَالَ رَجُلٌ : الْقَذَاةَ أَرَاهَا فِي الْإِنَاءِ؟ فقالب: "أهرقها" قَالَ: إِنِّي لاَ أَرْوَى مِنْ نَفَسٍ وَاحِدٍ؟ قَالَ: "فَأَبِنِ الْقَدَحَ إِذًا عَنْ فِيكَ".((رَوَاهُ التِّرْمِذِيّ))
Abu Sa'id Al-Khudri (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) prohibited us blowing in the drinking water. A man said: "O Messenger of Allah! Sometimes I see some litter floating about on the surface. What should I do then?" He (ﷺ) replied, "Pour them out." Then the man said: "My thirst is not quenched with one draught." Messenger of Allah (ﷺ) said, "Then put away the cup from your mouth (in between three gulps), and take breath." [At-Tirmidhi].
Riyad as-Salihin, 764