Abu Musa Ashari reported,

The Messenger of Allah ﷺ saw a man performing the two rakahs of Fajr just as the muadhin began the iqamah. The Prophet ﷺ tapped his shoulder and said, "Should this not have come before that?"

Azami 2444

Hasan

عن أبي موسى

أن رسول الله ﷺ رأى رجلا يصلي ركعتي الفجر حين أخذ المؤذن يقيم، فغمز النبي الله ﷺ منكبه وقال: ألا كان هذا قبل هذا؟

الأعظمي 2444حسن
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Prayer
Chapter
Sunnah prayers and voluntary prayers in general
Section
Dislike of being preoccupied with the two rakah of Fajr when the prayer has been called
Numbering
Jami al-Kamil 2444 (2nd edition)
Azami 2444