Musnad Ahmad 1081:2

Abu Sa’id narrated to us, ‘Abd al-Rahman ibn Abi al-Rijal narrated to us, he said: I heard ‘Umar, the freed slave of Ghufrah, narrating from Tha’labah ibn Abi Malik, from Harithah ibn al-Nu’man, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "One of you acquires livestock and attends the prayer in congregation, then his livestock becomes difficult for him, so he says: 'If I sought a place for my livestock that is more abundant in pasture than this,' so he moves and does not attend except for the Friday prayer. Then his livestock becomes difficult for him, so he says: 'If I sought a place for my livestock that is more abundant in pasture than this,' so he moves and does not attend the Friday prayer nor the congregation, and a seal is placed upon his heart."