Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) was asked about the time of the morning prayer. He offered this prayer when true dawn had broken, then after that (on the next day) he offered it in the light. Then he said: Where is the man who asked about the time of the morning prayer? Between these two is the appointed time.
Imam al-Bazzar recorded it, and its narrators are the narrators of the "Sahih".
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 1780