Hadithcore
Sunan Abi Dawud, 4439
da’if· Al-Albani

Jabir said:

A man committed fornication with a woman. It was not known that he was married. So he was flogged. It was then known that he was married, so he was stoned to death.

حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الرَّحِيمِ أَبُو يَحْيَى الْبَزَّازُ، أَخْبَرَنَا أَبُو عَاصِمٍ، عَنِ ابْنِ جُرَيْجٍ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، أَنَّ رَجُلاً، زَنَى بِامْرَأَةٍ فَلَمْ يَعْلَمْ بِإِحْصَانِهِ فَجُلِدَ ثُمَّ عَلِمَ بِإِحْصَانِهِ فَرُجِمَ ‏.‏

References2 variants
In-Book Reference
Book 40, Hadith 89
English Reference
Book 39, Hadith 4425