The Office of the Judge (Kitab Al-Aqdiyah)
Dawud :: Book 24 : Hadith 3609
Narrated AbuHurayrah:
Two men disputed about some property and brought the case to the Holy Prophet (peace_be_upon_him), but neither of them could produce any proof. So the Holy Prophet (peace_be_upon_him) said: Cast lots about the oath whatever it may be, whether they like it or dislike it.