Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that I heard the Messenger of Allah (peace and blessings be upon him) saying: "On the Day of Resurrection, my Ummah will be called with bright foreheads and bright hands and feet due to the marks of ablution. Therefore, whoever among you can increase his brightness, let him do so." (i.e., perform ablution thoroughly)