Sakhar, a chief of a tribe, had helped Muhammad (pbuh) greatly in the siege of Taif, for which he was naturally obliged to him. Soon after, two charges were brought against Sakhar: one by Mughira of illegal confinement of his (Mughira's) aunt and the other by Banu-Salim of forcible occupation of his spring by Sakhar. In both cases, he decided against Sakhar and made him undo the wrong. [Abu Dawud]
Abdullah Bin Sahal, a companion, was deputized to collect rent from Jews of Khaibar. His cousin Mahisa accompanied him but, on reaching Khaibar, they had separated. Abdullah was waylaid and done to death. Mahisa reported this tragedy to the Prophet (pbuh) but as there were no eye-witnesses to identify the guilty, he did not say anything to the Jews and paid the blood-money out of the state revenues. [SahihBukhari]