Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says: A man asked the Noble Prophet (peace and blessings be upon him) about prayer. The Messenger of Allah (peace and blessings be upon him) said: "Cleanse between the fingers of the hands and feet." By this, he meant that ablution should be performed completely. Furthermore, the Prophet (peace and blessings be upon him) also said to him: "When you bow (in ruku‘), place your palms on your knees and be at ease in the position of ruku‘, and when you prostrate (in sujud), place your forehead firmly on the ground, until you feel the thickness of the earth."