Hadith 17:999
'Abdullah ibn al-Mubarak narrated to us, from Ma'mar, from Ibn Tawus, from his father, that whenever letters would accumulate with him, he would order them to be burned.
حدثنا عبد الله بن مبارك عن معمر عن بن طاوس عن أبيه أنه كان إذا اجتمعت عنده الرسائل أمر بها فأحرقت