(2) باب ذِكْرِ اخْتِلاَفِ أَلْفَاظِ النَّاقِلِينَ لِخَبَرِ جَابِرٍ فِي الْعُمْرَى
'Abdul-Karim narrated from 'Ata', who said:
"The Messenger of Allah forbade 'Umra and Ruqba." I said: "What is Ruqba?" He said: "When one man says to another: 'This belongs to you for the rest of your life.' But if you do that, it is permissible."
Reference: Sunan an-Nasa'i 3728
In-book reference: Book 34, Hadith 10
English translation: Vol. 4, Book 34, Hadith 3759