Sayyiduna Hudhayfah (may Allah be pleased with him) narrates: I came to the Prophet (peace and blessings be upon him) while he was praying. I stood behind him and began praying following him, and he did not know about it. He began reciting Surah al-Baqarah, and I thought he would go into bowing after a little while, but he (peace and blessings be upon him) kept on reciting. Here the narrator named Sinan stated: To my knowledge the narration also contains these words: He said: The Prophet (peace and blessings be upon him) prayed four rak'ahs, and his bowing too was (as long) as his standing. The narrator says: I mentioned this to the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Why did you not tell me?" Sayyiduna Hudhayfah (may Allah be pleased with him) said: "By the One who sent you as a Prophet with the truth, I still feel (pain from that long standing) in my back even now." The Prophet (peace and blessings be upon him) said: "Had I known that you were standing behind me, I would have made the prayer short." (Allamah al-Haythami says:) I say: Part of the beginning of this narration is reported in the "Sahih".
Al-Tabarani recorded it in al-Mu'jam al-Awsat. Its chain contains a narrator, Sinan bin Harun al-Burjumi. Yahya bin Ma'in says: Sinan bin Harun is the brother of Sayf, and of the two Sinan is in the better state. On another occasion he said: Sinan is more thiqah (trustworthy) than Sayf. Others besides Yahya bin Ma'in declared him da'if (weak).