Abu Dawud Book 34, Hadith Number 4562.

Chapter : Bloodwit for an unborn child.

Narated By Abu Hurayrah : The Apostle of Allah (PBUH) gave judgment that a male or a female slave, or a horse or a mule should be paid for a miscarriage.

Abu Dawud said: Uammad b. Salamah and Khalid b. ‘Abd Allah transmitted this tradition from Muhammad b. ‘Amr, but they did not mention “or a horse or a mule”