Sahih Muslim Book 4, Hadith Number 1777.

Chapter : Excellence of the recitation of the two suras concerning the taking of refuge.

Salim narrated on the authority of his father (Ibn ‘Umar) that the Apostle of Allah (may peace be upon him) said: Envy is not justified but in case of two persons only: one who, having been given (knowledge of) the Qur’an by Allah, recites it during the night and day (and also acts upon it) and a man who, having been given wealth by God, spends it during the night and the day (for the welfare of others seeking the pleasure of the Lord).