Aamir bin Sa’d narrates from Sayyiduna Abbas bin Abdul Muttalib (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: “When a servant prostrates, seven parts prostrate along with him: his face, his two hands, his two knees, and his two feet.”
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 1922
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: م - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده قوي على شرط مسلم، وهو مكرر ما قبله.