Nuaim bin Abdullah once climbed onto the roof of the mosque and reached Hazrat Abu Hurairah (may Allah be pleased with him), who was performing ablution. He had washed his arms above the elbows. Then he turned towards me and said, "I heard the Noble Prophet (peace and blessings be upon him) say: On the Day of Resurrection, the people of my Ummah will have radiant and shining foreheads from the marks of ablution. Therefore, whoever among you can increase his brightness should do so."