Musnad Ahmad 32:1982

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, and Hajjaj narrated to us, he said: Shu'bah narrated to me, from Qatadah, he said: I heard Anas ibn Malik narrating from the Prophet, peace and blessings of Allah be upon him, he said: "There is no one who enters Paradise who would like to return to the world, even if he were to have everything that is on the earth, except for the martyr. For he wishes to return to the world and be killed ten times, because of what he sees of the honor."