What Nullifies Ablution
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 16
وَ رَوَى غَيْرُهُ: فِي اَلرَّجُلِ يَبُولُ ثُمَّ يَسْتَنْجِي ثُمَّ يَرَى بَعْدَ ذَلِكَ بَلَلاً «أَنَّهُ إِذَا بَالَ فَخَرَطَ مَا بَيْنَ اَلْمَقْعَدَةِ وَ اَلْأُنْثَيَيْنِ ثَلاَثَ مَرَّاتٍ وَ غَمَزَ مَا بَيْنَهُمَا ثُمَّ اِسْتَنْجَى فَإِنْ سَالَ ذَلِكَ حَتَّى بَلَغَ اَلسُّوقَ فَلاَ يُبَالِي.
Another narration (by Imam Jafar ibn Muhammad Al-Sadiq عليه السلام ) states: In the case of a man who urinates, performs istinja (cleansing of private parts), and then notices wetness afterward: 'If he, after urinating, presses the area between the anus and the testicles three times and massages it, then performs istinja, he need not worry even if wetness flows down to his thighs.'.
- Ṣaḥīḥ al-Faqīh