Anas bin Malik reported,

The Messenger of Allah ﷺ said, "When Allah created Adam, He left him as long as He willed to leave him. Iblis began to circle around him, looking at him. When he saw that he was hollow, he knew that he was a creature who could not control himself."

حدثنا عبد الصمد حدثنا حماد عن ثابت

عن أنس

أن رسول الله ﷺ قال لما خلق الله عز وجل آدم تركه ما شاء الله أن يدعه فجعل إبليس يطيف به ينظر إليه فلما رآه أجوف عرف أنه خلق لا يتمالك