Eid Mubarak
One of the main trials of Abraham's life was to face the command of God to sacrifice his dearest possession, his son. The son is not named in the Quran, but the earliest Islamic traditions identify Ishmael as the son who was sacrificed. Upon hearing this command, Abraham prepared to submit to the will of God. During this preparation, Shaitan (the Devil) tempted Abraham and his family by trying to dissuade them from carrying out God's commandment, and Abraham drove Satan away by throwing pebbles at him. In commemoration of their rejection of Satan, stones are thrown at symbolic pillars during the Stoning of the Devil during Hajj rites.
When Abraham attempted to cut his son's throat on mount Arafat, he was astonished to see that his son was unharmed and instead, he found an animal which was slaughtered. Abraham had passed the test by his willingness to carry out God's command.