It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) came to the valley of Ibn al-Azraq and said: "What valley is this?" They said: The valley of Ibn al-Azraq. He (peace and blessings be upon him) said: "It is as if I am looking at Musa (peace be upon him) descending (into this valley), calling out the talbiyah aloud to his Lord." Then he (peace and blessings be upon him) came to a mountain pass and said: "What pass is this?" It was said: Such-and-such pass. He (peace and blessings be upon him) said: "It is as if I am looking at Yunus bin Matta (peace be upon him) riding a red she-camel with curly hair, whose halter is of palm fibre, wearing a woollen cloak and calling out the talbiyah."
Imam al-Tabarani (may Allah have mercy on him) said: Hammad bin Salamah gave (the valley's name) as 'Ibn al-Azraq', whereas the correct name is only 'al-Azraq'.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12701