Mishkat al-Masabih #4106
Foods
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَعَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ أَنَّ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ النَّفْخِ فِي الشَّرَابِ فَقَالَ رَجُلٌ: الْقَذَاةَ أَرَاهَا فِي الْإِنَاءِ قَالَ: «أَهْرِقْهَا» قَالَ: فَإِنِّي لَا أُرْوَى مِنْ نَفَسٍ وَاحِدٍ قَالَ: «فَأَبِنِ الْقَدَحَ عَنْ فِيكَ ثُمَّ تَنَفَّسْ» . رَوَاهُ التِّرْمِذِيُّ والدارمي
Abu Sa'id al-Khudri told that the Prophet forbade blowing into a drink. When a man said he saw specks in the vessel he told him to pour them out, and when he said his thirst was not quenched in one breath he told him to remove the cup from his mouth and take a breath.
Tirmidhi and Darimi transmitted it.
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About Mishkat al-Masabih
This hadith is #4106 from Mishkat al-Masabih, in the Book of Foods.