Musnad Ahmad 31:256

Abu Ahmad al-Zubayri narrated to us, Abu al-Nu'man 'Abd al-Rahman ibn al-Nu'man al-Ansari narrated to us, from Abu Sa'id, the freed slave of al-Mahri, who said: My brother died, and I came to Abu Sa'id al-Khudri and said: "O Abu Sa'id, my brother has died and left behind a family, and I have a family, and we have no wealth. I have intended to go out with my family and my brother's family until we settle in some of these garrison towns, for it would be easier for us in our livelihood." He said: "Woe to you, do not go out, for I heard him—meaning the Prophet, peace and blessings of Allah be upon him—saying: 'Whoever bears its hardship and its severity with patience, I will be an intercessor for him—or a witness—on the Day of Resurrection.'"