Sayyiduna Abdur Rahman bin Awf (may Allah be pleased with him) narrates: Once the Prophet (peace and blessings be upon him) passed by us while we were picking the fruit of the arak tree. The Prophet (peace and blessings be upon him) said: "Pick the black ones; I too used to pick them when I used to graze goats." The people said: "O Messenger of Allah! You have grazed goats?" The Prophet (peace and blessings be upon him) said: "Yes! Every prophet has grazed goats."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Abu Salamah, who did not hear from his father.
Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "When Sayyiduna Musa (peace be upon him) was sent, he used to graze the goats of his family, and when I was sent, I used to graze the goats of my family at a place called Jiyad."
Ahmad recorded it as part of a long hadith which has already passed before this in the chapter on buying and selling, in the chapter that mentions the animals that ought to be kept.