It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that he heard the Noble Prophet (peace and blessings be upon him) say: On the Day of Resurrection, you will have radiant and shining foreheads from the marks of ablution, so whoever among you can increase his brightness should do so.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8741