Ibn Abi Layla, may Allah have mercy on him, says: We used to go to Sayyiduna Zaid bin Arqam, may Allah be pleased with him, and say: "Narrate to us from the Messenger of Allah, peace and blessings be upon him." (So he would narrate, but when he became old,) he used to say: "Indeed, we have grown old and have forgotten, and narrating the hadith of the Messenger of Allah, peace and blessings be upon him, is a serious matter."