Urwah (may Allah be pleased with him) said: When the Messenger of Allah (peace and blessings be upon him) was returning from the Tabuk campaign, some people plotted against him on the way and agreed among themselves to throw him down from a mountain pass (aqabah) on the road. Then he related the story with the same meaning as Ibn Ishaq.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17868