Humayd bin Hilal narrates: A man who heard a Bedouin told me that the Bedouin said: I saw the Prophet (peace and blessings be upon him) praying. He said: The Prophet (peace and blessings be upon him) raised his head from bowing (ruku') and raised both palms until he brought them level with the lobes of his ears (the narrator is unsure about one word here).
Ahmad recorded it; its chain contains a narrator who is not named.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2584