Wash your penis and do wudhu when you find a drop of urine .

This hadith is narrated by Yahya from Zayd ibn Aslam from his father that Umar ibn al-Khattab said. In this hadith, Umar advises to wash the penis and do wudu when one finds a drop of urine. This is because it is important to keep oneself clean in order to be able to pray properly. It teaches us that we should always strive for cleanliness and purity in our lives so that we can be closer to Allah SWT. We should also take care of our bodies by washing ourselves regularly with water or other cleansing agents as prescribed by Islam. Furthermore, this hadith also reminds us of the importance of prayer in our lives as it is an act of worship which brings us closer to Allah SWT.