Sunan an-Nasa'i, Volume 4, Book 30, Hadith 3678 (DarusSalam) ⓘ
It was narrated that 'Aishah said: "When this verse- 'And warn your tribe (O Muhammad) of near kindred'- was revealed, the Messenger of Allah said: 'O Fatimah, daughter of Muhammad! O Safiyyah bint 'Abdul-Muttalib! O Banu 'Abdul-Muttalib! I cannot avail you anything before Allah; ask me for whatever you want of my wealth.'"
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا أَبُو مُعَاوِيَةَ، قَالَ حَدَّثَنَا هِشَامٌ، - وَهُوَ ابْنُ عُرْوَةَ - عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ لَمَّا نَزَلَتْ هَذِهِ الآيَةُ {وَأَنْذِرْ عَشِيرَتَكَ الأَقْرَبِينَ} قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " يَا فَاطِمَةُ ابْنَةَ مُحَمَّدٍ يَا صَفِيَّةُ بِنْتَ عَبْدِ الْمُطَّلِبِ يَا بَنِي عَبْدِ الْمُطَّلِبِ لاَ أُغْنِي عَنْكُمْ مِنَ اللَّهِ شَيْئًا سَلُونِي مِنْ مَالِي مَا شِئْتُمْ ".
also referenced under: Hadith 3648 (Reference) & Book 30, Hadith 38 (In-Book)