Musnad Ahmad 30:960

'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from Abu Ishaq, from Mujahid, from Abu Hurayrah, that Jibril, peace be upon him, came and greeted the Prophet, may Allah bless him and grant him peace. He recognized his voice, so he said: "Enter." He said: "Indeed, there is a curtain in the house on the wall that has images in it, so cut off their heads, and make it into a rug or pillows, and tread upon them; for we do not enter a house in which there are images."