It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that a man asked the Prophet (peace and blessings be upon him) about a matter concerning prayer. The Prophet (peace and blessings be upon him) said to him: "Clean between the fingers of your hands and feet," meaning he instructed him regarding the completeness of ablution. Among these instructions, he also said: "When you bow (in ruku‘), place your palms on your knees until you are at ease in ruku‘, and when you prostrate (in sujud), press your forehead to the ground until you begin to feel the ground’s texture."