It is narrated from Muhammad bin Amr bin Ata that he was sitting among a group of the Companions of the Messenger of Allah (peace and blessings be upon him). We mentioned the prayer of the Messenger of Allah (peace and blessings be upon him), and Abu Humayd al-Sa'idi (may Allah be pleased with him) said: Of all of you, I remember the prayer of the Messenger of Allah (peace and blessings be upon him) best. I saw that when he said the takbir he would bring both his hands level with his shoulders, and when he bowed he would place both his hands on his knees, then he would bend his back. Then he mentioned the full hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2549