Bulugh al-Maram, Book 1, Hadith 125 (In-Book)

Narrated ‘Iesa bin Yazdad from his father (ra): Allah’s Messenger said: “When one of you passes urine, he should empty his penis three times”. [Reported by Ibn Majah through a weak chain of narrators].

وَعَنْ عِيسَى بْنِ يَزْدَادَ, عَنْ أَبِيهِ قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ إِذَا بَالَ أَحَدُكُمْ فَلْيَنْثُرْ ذَكَرَهُ ثَلَاثَ مَرَّاتٍ } رَوَاهُ اِبْنُ مَاجَه بِسَنَدٍ ضَعِيف ٍ (125)‏.‏ ‏3 ‏- ضعيف.‏ رواه ابن ماجه (326)‏.‏

sunnah.com

also referenced under: Book 1, Hadith 112 (English)