Musannaf Ibn Abi Shaybah 42 — Keeping up ablution and its virtue

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The people of my ummah will come to me on the Day of Resurrection with their limbs of ablution shining; this will be the distinctive mark of my ummah, a distinction that no one else will have."