Sahih Muslim 276b
Sahih Muslim · Book 2: The Book of Purification · Time-limit for wiping over the khuff
وَحَدَّثَنَا إِسْحَاقُ ، أَخْبَرَنَا زَكَرِيَّاءُ بْنُ عَدِيٍّ ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَمْرٍو ، عَنْ زَيْدِ بْنِ أَبِي أُنَيْسَةَ ، عَنِ الْحَكَمِ ، بِهَذَا الإِسْنَادِ مِثْلَهُ .
This hadith is narrated by Ubaidullah b. 'Amr and Zaid b. Abu Unaisa with the same chain of transmitters.