It is narrated from Sayyiduna Jabir (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When a person's brother tells him something, it is a trust with him, even if he did not urge him to keep it secret."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ja'far except Ayyub bin Waqid, and Muhammad bin Khulayd is alone in narrating it."