(50) باب تَحْرِيمِ الزَّكَاةِ عَلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَعَلَى آلِهِ وَهُمْ بَنُو هَاشِمٍ وَبَنُو الْمُطَّلِبِ دُونَ غَيْرِهِمْ
This hadith has been narrated on the authority of Shu'ba with the same chain of transmitters (and the words of the Holy Prophet) are:
" Sadaqa is not permissible for us."
Reference: Sahih Muslim 1069 b
In-book reference: Book 12, Hadith 211
USC-MSA web (English) reference(deprecated numbering scheme): Book 5, Hadith 2340