Jami` at-Tirmidhi 1187
جامع الترمذي#1187SahihThawban narrated that :The Messenger of Allah said: "Whichever woman seeks a Khul from her husband without harm (cause), then the scent of Paradise will be unlawful for her
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 13:14