question #1 Sahih al-Bukhari 6898, Book 87, Hadith 37 : What is the significance of providing proof in resolving disputes according to Islamic teachings?

(a man from the Ansar) that a number of people from his tribe went to Khaibar and dispersed, and
then they found one of them murdered. They said to the people with whom the corpse had been found,
“You have killed our companion!” Those people said, “Neither have we killed him, nor do we know
his killer.” The bereaved group went to the Prophet (ﷺ) and said, “O Allah’s Messenger (ﷺ)! We went to Khaibar
and found one of us murdered.” The Prophet (ﷺ) said, “Let the older among you come forward and
speak.” Then the Prophet (ﷺ) said, to them, “Bring your proof against the killer.” They said “We have no
proof.” The Prophet (ﷺ) said, “Then they (the defendants) will take an oath.” They said, “We do not accept
the oaths of the Jews.” Allah’s Messenger (ﷺ) did not like that the Blood-money of the killed one be lost
without compensation, so he paid one-hundred camels out of the camels of Zakat (to the relatives of
the deceased) as Diya (Blood-money).