(a) Abd al-Jabbar narrates from his father Wa'il bin Hujr (may Allah be pleased with him) that when he (peace and blessings be upon him) began the prayer, he raised his hands and said 'Allahu akbar', then he wrapped his hands in his garment and placed the right hand over the left. When he intended to bow, he did like this; then he brought his hands out of the garment, then raised his hands and said the takbir. Then, when he (peace and blessings be upon him) intended to prostrate, his knees would already have touched the ground before his hands. When he prostrated, his forehead was between his two hands, and he (peace and blessings be upon him) kept his arms well away from his armpits.
(b) Hammam said: Then, when he rose, he rose on his knees and supported himself on his thighs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2629