I heard the Messenger of Allah ﷺ say, "The ˹married˺ man and a woman, if they commit adultery, then absolutely stone them." (Using translation from Ḥākim 8072)
سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ الشَّيْخُ وَالشَّيْخَةُ إِذَا زَنَيَا فَارْجُمُوهُمَا الْبَتَّةَ نَكَالًا مِنَ اللهِ وَرَسُولِهِ