Mishkat al-Masabih 21 Foods كتاب الأطعمة 115

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.