It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said:
"There is no lifelong grant. Whoever is given something as a lifelong grant, it is his.' " (RU)
English reference (RU): Vol. 3, Book 14, Hadith 2379 (RU)
Arabic reference (RU): Book 14, Hadith 2469 (RU)