Musannaf Ibn Abi Shayba 18:447

Abu Bakr narrated to us, he said: Abd al-Rahim narrated to us, from al-Shaybani, from al-Sha'bi, who said regarding the breasts of a woman: For what is above them [the breasts], there is the full blood money (diyah), and for one of them, there is half the blood money.