(7) باب قضاء الحاجة
and Al-Hakim reported that:
"Urination is the main cause of punishment in the grave". [Its chain of narrators is authentic]. (TR)
Reference (TR): Bulugh al-Maram 104 (TR)
In-book reference (TR): Book 1, Hadith 123 (TR)
English translation (TR): Book 1, Hadith 110 (TR)