Musnad Ahmad 1153:876

'Affan narrated to us, he said: Abu 'Awanah narrated to us, from 'Umar ibn Abi Salamah, from Abu Salamah, he said: 'A'ishah said: "The Messenger of Allah, peace and blessings of Allah be upon him, leaned over me and said: 'You are the most important of what I leave behind my back. By Allah, none will show kindness to you except the patient ones,' or 'the truthful ones.'"