Hadith 17:293
'Abd al-Wahhab al-Thaqafi narrated to us, from Khalid al-Hadhdha', from Humayd ibn Hilal, who said: "Indeed, placing the hands on the hips (al-ikhtisar) in prayer is only disliked because Iblis was sent down [to earth] placing his hands on his hips."
حدثنا عبد الوهاب الثقفي عن خالد الحذاء عن حميد بن هلال قال إنما يكره الاختصار في الصلاة لأن [ إبليس ] أهبط مختصرا