Sunan Ibn Majah 481
سنن ابن ماجه#481SahihIt was narrated that Umm Habibah said:"I heard the Messenger of Allah say: 'Whoever touches his sexual organ then let him perform ablution
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih Lighairihi
Shuaib Al ArnautSahih Lighairihi
Zubair Ali ZaiHasan
In-book reference: 1:215