Hadith 6:149
10948. Abdullah ibn al-Mubarak narrated to us, from Hisham, from Muhammad, that he used to like, when a patient became severely ill, that his mustache, nails, and pubic hair be trimmed. If he perished, nothing would be taken from him.
حدثنا عبد الله بن مبارك عن هشام عن محمد انه كان يعجبه إذا ثقل المريض أن يؤخذ من شاربه وأظفاره وعانته فإن هلك لم يؤخذ منه شيء