Musnad Abu Ya'la al-Mawsili 115:178

Abu Musa narrated to us, Mu'adh narrated to us, my father narrated to me, from Qatadah, from Anas, who said: There is no one among the people of Paradise who would be pleased to return to the world, except for the martyr. For he loves to return to the world, saying: "Until I am killed ten times in the way of Allah," because of what he sees of the honor that Allah has given him.