Jami' al-Tirmidhi

Anas bin Malik said: "When the Prophet entered the toilet he would say: 'O Allah Indeed I seek refuge in You.'" Shu'bah (one of the narrators) said: "Another time he said: 'I seek refuge in You from AI-Khubthi and al-Khablth.' Or: 'Al-Khubthi and Al-Khaba'ith.'"