It is narrated from Sayyiduna Usama bin Zaid (may Allah be pleased with him) that when Jibreel (peace be upon him) descended upon the Noble Prophet Muhammad (peace and blessings be upon him and his family), he taught him how to perform ablution. And when he finished the ablution, he took a handful of water and sprinkled it over his private part. Thus, the Noble Prophet Muhammad (peace and blessings be upon him and his family) would also sprinkle water in this manner after performing ablution.