Sunan Abu Dawud, hadith 4434

حَدَّثَنَا أَحْمَدُ بْنُ إِسْحَاقَ الأَهْوَازِيُّ، حَدَّثَنَا أَبُو أَحْمَدَ، حَدَّثَنَا بَشِيرُ بْنُ الْمُهَاجِرِ، حَدَّثَنِي عَبْدُ اللَّهِ بْنُ بُرَيْدَةَ، عَنْ أَبِيهِ، قَالَ كُنَّا أَصْحَابَ رَسُولِ اللَّهِ نَتَحَدَّثُ أَنَّ الْغَامِدِيَّةَ وَمَاعِزَ بْنَ مَالِكٍ لَوْ رَجَعَا بَعْدَ اعْتِرَافِهِمَا أَوْ قَالَ لَوْ لَمْ يَرْجِعَا بَعْدَ اعْتِرَافِهِمَا لَمْ يَطْلُبْهُمَا وَإِنَّمَا رَجَمَهُمَا عِنْدَ الرَّابِعَةِ ‏.‏

Narrated Buraydah ibn al-Hasib: We, the Companions of the Messenger of Allah (ﷺ), used to talk mutually: Would that al-Ghamidiyyah and Ma'iz ibn Malik had withdrawn after their confession; or he said: Had they not withdrawn after their confession, he would not have pursued them (for punishment). He had them stoned after the fourth (confession)