Musnad Abu Ya'la al-Mawsili 154:159

Abu Khaythama narrated to us, Ubayd Allah ibn Abd al-Majid narrated to us, Ubayd Allah ibn Umar narrated to us, from Wahb ibn Qatan, that a freedwoman of Ibn Umar came to him to bid him farewell in order to leave Medina. She said, "I am going out to the countryside, for the times have become difficult for us." Ibn Umar said, "Sit down, you foolish woman, for I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: 'Whoever bears its hardship and its severity with patience, I will be an intercessor or a witness for him on the Day of Resurrection.'"