Musnad Abu Ya'la al-Mawsili 154:78

Ibn Numayr narrated to us, 'Abdah narrated to us, from Abu Raja' al-Jazari, from Furat ibn Salman, from Maymun ibn Mihran, from Ibn 'Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "No household of three [people] endures hardship except that Allah brings them provision."