Musnad Ahmad 28:133

Yahya ibn Ishaq narrated to us, Ibn Lahi'ah informed us, from Sharhabil ibn Shurayk, from Abu Abd al-Rahman al-Hubuli, from Abdullah ibn Amr, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "He has succeeded who has believed, and has been provided with a sufficiency, and Allah has made him content with what He gave him."