Musnad Ahmad

Abu Ja'far Muhammad bin Ali, may Allah have mercy on him, says that whenever Abdullah bin Umar, may Allah be pleased with them both, heard something from the Prophet, peace be upon him, or was present at an occasion, he would not make any addition or omission when narrating it. Once, Ubaid bin Umair, may Allah be pleased with him, was speaking and Ibn Umar, may Allah be pleased with them both, was also present there. Ubaid bin Umair said that the Messenger of Allah, peace be upon him, said: "The example of a hypocrite is like that of a goat between two flocks; when it goes to one flock, the goats there drive it away with their horns, and when it goes to the other flock, the goats there also drive it away with their horns." Ibn Umar, may Allah be pleased with them both, said: "This hadith is not like this." Ubaid bin Umair was displeased at this. Abdullah bin Safwan was also present in that gathering. He said: "O Abu Abdur Rahman! May Allah's mercy descend upon you, how did the Prophet, peace be upon him, actually say it?" Ibn Umar, may Allah be pleased with them both, then narrated the hadith again and used the word «ربيضين» instead of «غنمين». So Abdullah said: "May Allah have mercy on you, both words mean the same." Ibn Umar, may Allah be pleased with them both, said: "I heard the Prophet, peace be upon him, say it in this way."