Sawban (May God be pleased with him) narrates:
When the following verse was revealed “They who hoard up gold and silver and do not spend it in the way of Allah, unto them give tidings of a painful doom” (Surah At-Taubah , 9/34) we were on a journey with our Prophet (Peace and Blessings be Upon Him).
Some of the Companions asked: “The verse was revealed concerning gold and silver. If only we could know which possession is better for us?”
The Prophet (Peace and Blessings be Upon Him) replied:
“(The superior possessions are) a tongue which remembers God, a heart filled with thanks to God, and a pious wife who helps in her husband’s virtuous deeds.”
(Tirmidhi, Interpretation, Repentance)