NASAI 3714:
from Ṭāwus —
"The Messenger of Allah said: 'Ruqba is not permissible. Whoever is given something on the basis of Ruqba, it is part of his estate.'"
النسائي ٣٧١٤:
عن طاوس —
قَالَ رَسُولُ اللَّهِ ﷺ لاَ تَحِلُّ الرُّقْبَى فَمَنْ أُرْقِبَ رُقْبَى فَهُوَ سَبِيلُ الْمِيرَاثِ