Sunan Ibn Majah, Book 16, Hadith 2563 (In-Book) ⓘ
It was narrated that Anas bin Malik said: “When the Messenger of Allah conquered Khaibar, he gave it (to its people) in return for half (of its yield).”
حَدَّثَنَا عَلِيُّ بْنُ الْمُنْذِرِ، حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ، عَنْ مُسْلِمٍ الأَعْوَرِ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ لَمَّا افْتَتَحَ رَسُولُ اللَّهِ صلى الله عليه وسلم خَيْبَرَ أَعْطَاهَا عَلَى النِّصْفِ .
also referenced under: Hadith 2469 (Reference) & Volume 3, Book 16, Hadith 2469 (DarusSalam)