Musnad Ahmad 1153:276

Yahya narrated to us, from Ibn ‘Ajlan, who said: Sa‘d ibn Ibrahim informed me, from Abu Salamah, from ‘Aishah, from the Prophet (peace and blessings of Allah be upon him), who said: "There were among the nations those who were inspired (muhaddathun). If there is any such person in my nation, it is ‘Umar."