Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) saw a man offering the sunnah of Fajr after the mu'adhdhin had called the iqamah, so he nudged him on the shoulder and said: "Could these not have been offered before this?"
Al-Tabarani recorded it in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat, and its narrators have been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2394
Hadith Gradingمحدثین:إسنادہ صحیح۔
Hadith Takhrij«أخرجه المعجم الصغير للطبراني برقم: 129»