It says (Tehilim 34:10):
יראו את ה' קדושיו כי אין מחסור ליראיו
Why do we tell the holy ones to fear God because they will lack nothing? The Mishnah (Avos 1:3) says one should serve God without intending to receive reward. Obviously, not everyone is on that level, as the Tosafos Yom Tov explains there, but I would have thought the קדושיו that are mentioned are on that level?