Musnad Ahmad #917

Simak bin `Ubaid bin al-Waleed al-`Absi said: I entered upon `Abdur-Rahman bin Abi Laila, who told me that he heard `Ali (رضي الله عنه) say in ar-Rahbah: I adjure by Allah any man who heard the Messenger of Allah (ﷺ) and was present on the day of Ghadeer Khumm to stand up, and no one is to stand up except those who saw him. Twelve men stood up and said: We saw and heard him when he took him by the hand and said, `O Allah, take as friends those who take him as a friend, and take as enemies those who take him as an enemy, support those who support him and forsake those who forsake him.` Everyone stood up except three. He prayed against them and his supplication against them was fulfilled.