Sahih al-Bukhari Book 74, Hadith 34
Allah's Messenger (ﷺ) said, "The best object of charity is a she-camel which has (newly) given birth and
gives plenty of milk, or a she-goat which gives plenty of milk; and is given to somebody to utilize its
milk by milking one bowl in the morning and one in the evening."
The Prophet (ﷺ) came from Mecca with Abu Bakr. Abu Bakr said "We passed by a shepherd and at that time Allah's Messenger (ﷺ) was thirsty. I milked a little milk in a bowl and Allah's Messenger (ﷺ) drank till I was pleased. Suraqa bin Ju'shum came to us riding a horse (chasing us). The Prophet (ﷺ) invoked evil upon him, whereupon Suraqa requested him not to invoke evil upon him, in which case he would go back. The Prophet (ﷺ) agreed.
Allah's Messenger (ﷺ) drank milk and then rinsed his mouth and said, "It contains fat."