The wife of Thabit bin Qais was granted a Khul from her husband during the time of the Prophet. So the Prophet ordered her to observe an Iddah of a menstruation.
Jami` at-Tirmidhi Book 13, Hadith 12
← Previous Hadith that she got a Khul during the time of the Prophet. So the Prophet ordered her - or: she was ordered - that she observe an Iddah of a menstruation."

Jami` at-Tirmidhi Book 13, Hadith 11 Next Hadith → The Prophet said: "The women who seek a Khul are hypocrites."

Jami` at-Tirmidhi Book 13, Hadith 13