Musnad Abu Ya'la al-Mawsili 106:57

Muhammad ibn Bashar narrated to us, Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Abu Ishaq al-Hamdani, who said: I heard al-Bara' ibn 'Azib say: When the Messenger of Allah (may Allah bless him and grant him peace) came from Makkah to Madinah, Suraqah ibn Malik followed him. The Messenger of Allah (may Allah bless him and grant him peace) supplicated against him, so his horse sank into the ground. He said: "Supplicate to Allah for me, and I will not harm you." So he supplicated for him. Then the Messenger of Allah (may Allah bless him and grant him peace) became thirsty, and they passed by a shepherd. Abu Bakr al-Siddiq said: So I took a cup and milked a small amount of milk into it, then I brought it to him, and he drank. Then he drank until I was satisfied.