Musnad Abu Ya'la al-Mawsili 6:145

Wahb ibn Baqiyyah narrated to us, Khalid narrated to us, from Khalid, from Ikrimah, from Sa’d ibn Malik: That the Messenger of Allah (may Allah bless him and grant him peace) said to him on the day of Uhud, while he was shooting: "Shoot, may my father and mother be sacrificed for you."