Hadith.1468 - Al-Halabi narrated from Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (as) from his father (as) that when he would go out on the days of Eid al-Fitr and Eid al-Adha, he would refuse to have a carpet (or mat) brought to him to pray on.
He would say, "
This is a day when the Messenger of Allah (sw) would go out until he was exposed to the horizons of the sky, then he would place his forehead on the earth."