"The Messenger of Allah said: 'Ruqba is not permissible. Whoever is given something on the basis of Ruqba, it is part of his estate.'"
Sunan an-Nasa'i Book 33, Hadith 9
← Previous Hadith "'Umra and Ruqba are not proper. Whoever gives something on the basis of 'Umra or Ruqba, it belongs to the one to whom he gave it on that basis, both during his lifetime and after his death." Hanzalah narrated it in Mursal form.

Sunan an-Nasa'i Book 33, Hadith 8 Next Hadith → "The Messenger of Allah said: 'Umra (a gift given for life) is part of the estate.'"

Sunan an-Nasa'i Book 33, Hadith 10