(a) Sayyidah Aishah (may Allah be pleased with her), describing the prayer of the Prophet (peace and blessings be upon him), says that he (peace and blessings be upon him) used to forbid "anyone spreading his forearms in prostration like a beast of prey."
(b) Narrations on this subject from Jabir bin Abdullah, Abu Hurayrah and Abd al-Rahman bin Shibl (may Allah be pleased with them) have already passed.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2702