Sahih Muslim
Sahih Muslim 166a
حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، وَسُرَيْجُ بْنُ يُونُسَ، قَالاَ حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا دَاوُدُ بْنُ أَبِي هِنْدٍ، عَنْ أَبِي الْعَالِيَةِ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم مَرَّ بِوَادِي الأَزْرَقِ فَقَالَ " أَىُّ وَادٍ هَذَا " . فَقَالُوا هَذَا وَادِي الأَزْرَقِ . قَالَ " كَأَنِّي أَنْظُرُ إِلَى مُوسَى - عَلَيْهِ السَّلاَمُ - هَابِطًا مِنَ الثَّنِيَّةِ وَلَهُ جُؤَارٌ إِلَى اللَّهِ بِالتَّلْبِيَةِ " . ثُمَّ أَتَى عَلَى ثَنِيَّةِ هَرْشَى . فَقَالَ " أَىُّ ثَنِيَّةٍ هَذِهِ " . قَالُوا ثَنِيَّةُ هَرْشَى قَالَ " كَأَنِّي أَنْظُرُ إِلَى يُونُسَ بْنِ مَتَّى - عَلَيْهِ السَّلاَمُ - عَلَى نَاقَةٍ حَمْرَاءَ جَعْدَةٍ عَلَيْهِ جُبَّةٌ مِنْ صُوفٍ خِطَامُ نَاقَتِهِ خُلْبَةٌ وَهُوَ يُلَبِّي " . قَالَ ابْنُ حَنْبَلٍ فِي حَدِيثِهِ قَالَ هُشَيْمٌ يَعْنِي لِيفًا .
Ahmad ibn Hanbal and Surayj ibn Yunus narrated to us: Hushaim narrated to us; Dawud ibn Abi Hind informed us, from Abu al-'Aliya, from Ibn 'Abbas, that the Messenger of Allah (peace and blessings be upon him) passed through the Valley of al-Azraq and asked: What valley is this? They said: This is the Valley of al-Azraq. He said: It is as if I can see Moses, peace be upon him, descending from the mountain pass, raising his voice in the talbiya. Then he came to the pass of Harsha and asked: What pass is this? They said: The pass of Harsha. He said: It is as if I can see Yunus ibn Matta, peace be upon him, riding a strong red she-camel, wearing a woolen cloak, with its rein made of fibers, and raising his voice in the talbiya. Ibn Hanbal added in his version: Hushaim said that khulba means fiber.
Translation notes
The final gloss explains khulba as a plant fiber; the source does not specify the plant in this wording.