´Qais narrated:` "Allah's Messenger (S) went out and the Iqamah was called for the Salat so I prayed As-Subh with him. Then the Prophet (S) turned and found me performing Salat so he said: 'Easy O Qais! Are there two prayers together?' I said: 'O Messenger of Allah! I did not perform the two Rak'ah (before) Fajr.' He said: 'Then there is no harm.'"
Hadith Referenceسنن ترمذي / أبواب السهو / 422
Hadith Gradingالألبانی:صحيح، ابن ماجة (1151)
Hadith Takhrij«سنن ابی داود/ الصلاة 295 (1267) ، سنن ابن ماجہ/الإقامة 104 (1154) ، ( تحفة الأشراف : 11102) ، مسند احمد (5/447) (صحیح)»