We do not know what to do with the cloth of Egypt, for the Messenger of Allah ﷺ forbade us from facing or turning our backs to the two qiblahs. Hammam said, meaning when relieving oneself or urinating.
حدثنا عفان حدثنا همام أخبرنا إسحاق ابن أخي أنس عن رافع بن إسحاق
ما ندري كيف نصنع بكرابيس مصر وقد نهانا رسول الله ﷺ أن نستقبل القبلتين ونستدبرهما وقال همام يعني الغائط والبول
No references are available.
Its isnad is sahih. Ishaq, the nephew of Anas, is Ishaq bin Abdullah bin Abu Talha the Ansari, a trustworthy narrator whose hadith is found in all the major collections (al-Jamaah). The hadith was mentioned earlier at 23406.