Musnad Ahmad 28:421

'Abd al-Razzaq narrated to us, Ibn Jurayj informed us, 'Amr ibn Shu'ayb informed me, from 'Abd Allah ibn 'Amr ibn al-'As, who said: While we were with the Messenger of Allah (peace and blessings of Allah be upon him) in some part of the upper valley, intending to pray, he stood and we stood. Suddenly, a donkey emerged upon us from the mountain pass of Abu Dabb, the mountain pass of Abu Musa. The Prophet (peace and blessings of Allah be upon him) held back and did not say the takbir. Ya'qub ibn Zam'ah ran toward it until he turned it back.