Musannaf Ibn Abi Shayba 13:2279

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Muhammad ibn Sharik narrated to us, he said: ‘Ata’ narrated from Abu Hurayrah, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Excellent are the thirty camels; one is carried upon their noble one, their equipment is lent, their abundant milker is gifted, and he collects them on the day of their watering at their resting places."