Musnad Ahmad 503:1

Hassan narrated to us, Ibn Lahi'ah narrated to us, Abu 'Ashanah narrated to me, that Sufyan ibn Wahb al-Khawlani narrated to him: That he was under the shade of the riding beast of the Messenger of Allah (peace and blessings of Allah be upon him) on the day of the Farewell Pilgrimage, or that a man narrated that to him, and the Messenger of Allah (peace and blessings of Allah be upon him) was delivering a sermon. The Messenger of Allah (peace and blessings of Allah be upon him) said: "Have I conveyed?" We thought he meant us, so we said: "Yes." Then he repeated it three times, and he said among what he said: "A journey in the afternoon in the cause of Allah is better than the world and what is upon it, and a journey in the morning in the cause of Allah is better than the world and what is upon it. And the believer is sacred to the believer: his honor, his wealth, and his blood; he has made them sacred just as this day has been made sacred."