Silsilah as-Sahihah 404 — Sprinkling water on private parts after wudu

It is narrated from Sayyiduna Zaid bin Harithah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "In the early days, Jibreel came to the Messenger of Allah (peace and blessings of Allah be upon him) and taught him ablution and prayer. When he finished ablution, he took a handful of water and sprinkled it on his private part."