Jami` at-Tirmidhi 82
جامع الترمذي#82SahihBusrah bint Safwan narrated that :the Prophet said: "Whoever touches his penis, then he is not to pray until he performs Wudu
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 1:82