Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 5901
A'isha reported Allah's Messenger (may peace be upon him) as saying: There had been among the people before you inspired persons and if there were any such among my Umma Umar b. Khattab would be one of them. Ibn Wahb explained the word Muhaddathun as those who receive hint from the High (Mulhamun).