Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) was asked about whistling, and he said: "It is twisting the corners of the mouth."
Al-Tabarani recorded it. Its chain contains a narrator, Wasil bin al-Sa'ib, and he is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدب / 13268
Hadith Gradingمحدثین:ضعیف جداً
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (4072) ، أخرجه المعجم الكبير للطبراني برقم: 4072»