Musnad Ahmad 1119:34

Muhammad ibn Bakr narrated to us, he said: Sa‘id narrated to us, from Qatadah, from Abu al-Malih al-Hudhali, from ‘Awf ibn Malik al-Ashja‘i, who said: We were with the Messenger of Allah, may Allah bless him and grant him peace, on one of his journeys. The Prophet of Allah, may Allah bless him and grant him peace, made his camel kneel, and we made our camels kneel with him. He mentioned its meaning, except that he said: "And between that half of my nation shall enter Paradise."