Musnad Ahmad 1891

It was narrated from Ibn "Abbas that the Prophet (ﷺ) set out on the day of the conquest and he was fasting, then when he was in al-Kadeed, he broke his fast, and it is only what the Messenger of Allah (ﷺ) did last that is to be followed. It was said to Sufyan: With regard to the words, it is only what the Messenger of Allah (ﷺ) did last that is to be followed, are these the words of az-Zuhri or of Ibn "Abbas? He said: This is how it appears in the hadeeth.