Musannaf Ibn Abi Shayba 33:368

Waki’ narrated to us, from Abu Hilal, from Mu’awiyah ibn Qurrah, who said: Abu al-Darda’ fell ill. So they visited him and said: "What do you complain of?" He said: "My sins." It was said: "What do you desire?" He said: "Paradise." It was said: "Shall we call a doctor for you?" He said: "He is the one who laid me down."