Musannaf Ibn Abi Shaybah 8535 — The eclipse prayer: how many rakahs it

Tha'labah bin Abbad al-Abdi said: Once I was present at a sermon of Sayyiduna Samurah bin Jundub (may Allah be pleased with him). He mentioned that he and a boy of the Ansar were shooting at a target in the time of the Prophet (peace and blessings be upon him), when the sun, to the eye of an onlooker, was two or three spears' length above the horizon. It turned black like the black plant called tannumah. One of us said to his companion: "Let us go to the mosque; the Messenger of Allah (peace and blessings be upon him) will surely say something to his Ummah about this." We went quickly to the mosque and saw that it was crowded and the people were gathered. When the Prophet (peace and blessings be upon him) came out to go to the mosque, we had the good fortune of going with him. He went forward and led the people in a prayer so long that he had never led so long a prayer; we did not hear his voice in it. Then he made a prostration so long that he had never made so long a prostration; we did not hear his voice. He did the same in the second rak'ah. While he was sitting in the second rak'ah, the sun became clear. Then he gave the salam.