Sahih al-Bukhari Book 74, Hadith 33
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.
Abu Humaid, an Ansari man, came from AnNaqi carrying a cup of milk to the Prophet. The Prophet (ﷺ) said, "Will you not cover it even by placing a stick across it?"
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."