Abu Dawud Book 17, Hadith Number 3520.
Chapter : Not known.
Narated By Umar ibn al-Khattab : reported the Prophet (PBUH) as saying: There are people from the servants of Allah who are neither prophets nor martyrs; the prophets and martyrs will envy them on the Day of Resurrection for their rank from Allah, the Most High.
They (the people) asked: Tell us, Apostle of Allah, who are they? He replied: They are people who love one another for the spirit of Allah (i.e. the Qur’an), without having any mutual kinship and giving property to one. I swear by Allah, their faces will glow and they will be (sitting) in (pulpits of) light. They will have no fear (on the Day) when the people will have fear, and they will not grieve when the people will grieve.
He then recited the following Qur’anic verse: “Behold! Verily for the friends of Allah there is no fear, nor shall they grieve.”