"My father narrated to us: Ubaidullah -he is, Ibn 'Amr- narrated to us, from Sufyan, from Ibn Abi Najih, from Tawus, from Zaid bin Thabit, that the Prophet said: 'Ar-Ruqba is permissible.'" (Using translation from Nasāʾī 3706)  

عَنِ النَّبِيِّ ﷺ قَالَ «الرُّقْبَى جَائِزَةٌ»  

"Muhammad -he is, Ibn Yusuf- narrated to us, he said: 'Sufyan narrated to us from Ibn Abi Najih, from Tawus, from a man, from Zaid bin Thabit that the Prophet ruled that the Ruqba belongs to the one to whom it is given.'" (Using translation from Nasāʾī 3707)  

أَنَّ النَّبِيَّ ﷺ جَعَلَ الرُّقْبَى لِلَّذِي أُرْقِبَهَا  

"Abdul-Jabbar bin Al-'Ala' narrated to us, he said: 'Sufyan narrated to us from Ibn Abi Najih, from Tawus, and perhaps it is from Ibn 'Abbas, who said: There is no Ruqba, and whoever gives a gift on the basis of Ruqba, it is part of his estate.'" (Using translation from Nasāʾī 3708)  

لَا رُقْبَى فَمَنْ أُرْقِبَ شَيْئًا فَهُوَ بِسَبِيلِ الْمِيرَاثِ