Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:82Isḥāq b. Manṣūr > Yaḥyá b. Saʿīd al-Qaṭṭān > Hishām b. ʿUrwah from my father > Busrah b. Ṣafwān

the Prophet said: "Whoever touches his penis, then he is not to pray until he performs Wudu"  

الترمذي:٨٢حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ قَالَ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ عَنْ هِشَامِ بْنِ عُرْوَةَ قَالَ أَخْبَرَنِي أَبِي عَنْ بُسْرَةَ بِنْتِ صَفْوَانَ

أَنَّ النَّبِيَّ ﷺ قَالَ مَنْ مَسَّ ذَكَرَهُ فَلاَ يُصَلِّ حَتَّى يَتَوَضَّأَ قَالَ وَفِي الْبَابِ عَنْ أُمِّ حَبِيبَةَ وَأَبِي أَيُّوبَ وَأَبِي هُرَيْرَةَ وَأَرْوَى ابْنَةِ أُنَيْسٍ وَعَائِشَةَ وَجَابِرٍ وَزَيْدِ بْنِ خَالِدٍ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ قَالَ هَكَذَا رَوَاهُ غَيْرُ وَاحِدٍ مِثْلَ هَذَا عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ بُسْرَةَ