Sahih Muslim
The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness (Kitab Al-Dhikr)
Book Number: 035 / Hadith Number: 6482
Nadr b. Anas reported, as when Anas was alive, that he said: Had Allah's Messenger (may peace be upon him) not stated this.." None should make a request for death," I would have definitely done that.