Abu Muhammad Fadala ibn 'Ubayd al-Ansari reported that he heard the Messenger of Allah, may Allah bless him and grant him peace, say, "O the delight of the one who is guided to Islam, has adequate livelihood, and is contented."
Riyadh-as-Saliheen by Imam Al-Nawawi, volume 4, hadith number 513 - Sunni Hadith