Sulaiman b. Yasar, the freed slave of Maimuna, the wife of Allah's Apostle ﷺ, narrated from one of the Ansari Companions of Messenger of Allah ﷺ that Messenger of Allah ﷺ retained (the practice) of Qasama as it was in the pre-Islamic days.
أَخْبَرَنِي أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ وَسُلَيْمَانُ بْنُ يَسَارٍ مَوْلَى مَيْمُونَةَ زَوْجِ النَّبِيِّ ﷺ عَنْ رَجُلٍ مِنْ أَصْحَابِ رَسُولِ اللَّهِ ﷺ مِنَ الأَنْصَارِ أَنَّ رَسُولَ اللَّهِ ﷺ أَقَرَّ الْقَسَامَةَ عَلَى مَا كَانَتْ عَلَيْهِ فِي الْجَاهِلِيَّةِ