Hadithcore
Sahih Muslim, 1123 b
sahih

This hadith has been narrated on the authority of Abu Nadr with the same chain of transmitters, but he did not mention that he was mounting (riding on) his camel.

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَابْنُ أَبِي عُمَرَ، عَنْ سُفْيَانَ، عَنْ أَبِي النَّضْرِ، بِهَذَا الإِسْنَادِ ‏.‏ وَلَمْ يَذْكُرْ وَهُوَ وَاقِفٌ عَلَى بَعِيرِهِ ‏.‏ وَقَالَ عَنْ عُمَيْرٍ مَوْلَى أُمِّ الْفَضْلِ ‏.‏

References2 variants
In-Book Reference
Book 13, Hadith 139
USC-MSA web (English) reference
Book 6, Hadith 2495 (deprecated numbering scheme)