Isa bin Yazdad narrates from his father (may Allah be pleased with him) that when the Prophet (peace and blessings be upon him) urinated, he would clean his private part three times.
(b) Abdullah bin Adi says that Isa bin Yazdad narrates from his father in mursal form, and it is not authentic. Al-Bukhari said: Isa bin Yazdad is known only through this narration.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 552