قَالَ فَمَا خَطْبُكُمْ أَيُّهَا الْمُرْسَلُونَ (57)
(15:57) Then he asked them, "O Messengers of Allah ! What is the expedition for which you have been sent?" *33
*33) It appears from the question of Prophet Abraham that angels are sent down in human shape only on extraordinary occasions and on some important expedition.