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.
أَنَّ امْرَأَةَ ثَابِتِ بْنِ قَيْسٍ اخْتَلَعَتْ مِنْ زَوْجِهَا عَلَى عَهْدِ النَّبِيِّ ﷺ فَأَمَرَهَا النَّبِيُّ ﷺ أَنْ تَعْتَدَّ بِحَيْضَةٍ
The wife of Thabit ibn Qays separated herself from him for a compensation. The Prophet ﷺ made her waiting period a menstrual course. Abu Dawud said: This tradition has been transmitted by 'Abd al-Razzaq from Ma'mar from 'Amr b. Muslim from 'Ikrimah from the Prophet ﷺ in a mursal form (i.e. missing the link of the Companion).
أَنَّ امْرَأَةَ ثَابِتِ بْنِ قَيْسٍ اخْتَلَعَتْ مِنْهُ فَجَعَلَ النَّبِيُّ ﷺ عِدَّتَهَا حَيْضَةً
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."
أَنَّهَا اخْتَلَعَتْ عَلَى عَهْدِ النَّبِيِّ ﷺ فَأَمَرَهَا النَّبِيُّ ﷺ أَوْ أُمِرَتْ أَنْ تَعْتَدَّ بِحَيْضَةٍ قَالَ وَفِي الْبَابِ عَنِ ابْنِ عَبَّاسٍ
[Machine] That a woman named Thabit ibn Qays divorced him, so the Prophet ﷺ made her waiting period as her menstrual cycle.
أَنَّ امْرَأَةَ ثَابِتِ بْنِ قَيْسٍ اخْتَلَعَتْ مِنْهُ «فَجَعَلَ النَّبِيُّ ﷺ عِدَّتَهَا حَيْضَةً»
[Machine] That a woman named Thabit ibn Qays divorced him, "so the Prophet ﷺ made her waiting period be her menstruation."
أَنَّ امْرَأَةَ ثَابِتِ بْنِ قَيْسٍ اخْتَلَعَتْ مِنْهُ «فَجَعَلَ النَّبِيُّ ﷺ عِدَّتَهَا حَيْضَةً»
[Machine] A woman named Thabit ibn Qays divorced. The Prophet ﷺ ordered her to observe the waiting period.
أَنَّ امْرَأَةَ ثَابِتِ بْنِ قَيْسٍ اخْتَلَعَتْ «فَأَمَرَهَا النَّبِيُّ ﷺ أَنْ تَعْتَدَّ حَيْضَةً»
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." (Using translation from Tirmidhī 1185)
اخْتَلَعَتْ عَلَى عَهْدِ النَّبِيِّ ﷺ فَأَمَرَهَا النَّبِيُّ ﷺ أَوْ أُمِرَتْ أَنْ تَعْتَدَّ بِحَيْضَةٍ