(a) Abd al-Rahman bin Samurah (may Allah be pleased with him) says: I was practising with my arrows during the lifetime of the Prophet (peace and blessings be upon him) when suddenly the sun was eclipsed. I threw them down and said: "I must see what the Prophet (peace and blessings be upon him) does today at the solar eclipse." I reached him (peace and blessings be upon him), and he (peace and blessings be upon him) had raised his hands and was glorifying Allah (tasbih), praising Him (tahmid), declaring His oneness (tahlil), magnifying Him (takbir) and supplicating, until the eclipse ended. He (peace and blessings be upon him) recited two surahs and prayed two rak'ahs.
(b) "He (peace and blessings be upon him) recited two surahs and prayed two rak'ahs": this may mean that he (peace and blessings be upon him) performed two bowings in each rak'ah, as has been established.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة الخسوف / 6334