Volume 4, Book 52, Number 302:
Narrated Nafi:
Once a slave of Ibn ‘Umar fled and joined the Byzantine. Khalid bin Al-Walid got him back and
returned him to ‘Abdullah (bin ‘Umar). Once a horse of Ibn ‘Umar also ran away and followed the
Byzantines, and he (i.e. Khalid) got it back and returned it to ‘Abdullah.