Sufyan bin Sa‘id Ath-Thawri سفيان الثوري · The Book of ar-Ruqba

"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.'"

"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.'"

"The Messenger of Allah said: 'Ruqba is not permissible. Whoever is given something on the basis of Ruqba, it is part of his estate.'"