Abu Dawud said: Malis said: This refers to a man gives his evidence, but he does not know for whom it is meant. Al-Hamdani said: "He should inform the authorities. Ibn al-Sarh said: "He should give it to the ruler. The work ikhbar (inform) occurs in the version of al-Hamdani." Ibn al-Sarh said: "Ibn Abi 'Amrah and not 'Abd al-Rahman."
In-book : Book 25, Hadith 26
English translation : Book 24, Hadith 3589