Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) passed by a man who was milking a goat, and he (peace and blessings be upon him) said: "O so-and-so, when you milk, leave some for its young, for it is the most dutiful of all animals."
Al-Tabarani recorded it in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat. The narrators of al-Mu'jam al-Kabir are the narrators of the Sahih, except Abdullah bin Jubarah, who is thiqah (trustworthy).