It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Maintain moderation in prostrations, and none of you should spread his hands like a dog, and perform bowing and prostration completely. By Allah! When you bow and prostrate, I see you from behind me.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13973
Hadith Gradingحکم دارالسلام:حديث صحيح، خ: 822، م: 493، وهذا إسناد ضعيف لضعف شريك، لكنه توبع