It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: "The iqamah for the prayer had been called and I had not yet prayed the two (sunnah) rak'ahs (of Fajr). The Prophet (peace and blessings be upon him) saw me praying them, passed by me and said: 'Do you want to pray Fajr as four rak'ahs?'" Then Sayyiduna Ibn Abbas (may Allah be pleased with them both) was asked (by his student): Was it the Prophet (peace and blessings be upon him) who said this? He replied: "Yes."
Hadith Referenceمسند أبي يعلى الموصلي / أول مسند ابن عباس / 2575
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«حکم الحدیث مسند ابی یعلی محققاً تنسیق حسين سليم أسد - مکتبہ شاملہ :قال حسين سليم أسد: إسناده حسن . » «قال سعيد بن محمد السناري: ضعيف بهذا السياق» «أخرجه مسند أحمد برقم: 3319، وأخرجه المستدرك على الصحيحين برقم: 1195، مسند ابویعلیٰ ترقیم الاثری: 2568»