Wages (Kitab Al-Ijarah)
Dawud :: Book 23 : Hadith 3552
Narrated Zayd ibn Thabit:
The Prophet (peace_be_upon_him) said: If anyone gives something in life-tenancy, it belongs to the one to whom it is given, in his life and after his death; and do not give property to go to the survivor, for if anyone gives something to to to the survivor, it belongs to him.