(49) باب الْخَوَارِجُ شَرُّ الْخَلْقِ وَالْخَلِيقَةِ
Yusair b. 'Amr reported that he inquired of Sahl b. Hunaif:
Did you hear the Messenger of Allah (ﷺ) making a mention of the Khawarij? He said: I heard him say (and he pointed with his hand towards the east) that these would be a people who would recite the Qur'an with their tongues and it would not go beyond their collar bones. They would pass clean through their religion just as the arrow passes through the prey.
Reference: Sahih Muslim 1068 a
In-book reference: Book 12, Hadith 207
USC-MSA web (English) reference(deprecated numbering scheme): Book 5, Hadith 2336