Allah has informed us in the Qur'an whom shall take heed and remember, and in the verse,"Remind, then, if the reminder benefits"(Surat al-A'la: 9) He commands believers to remind those who are of such character. Some of the attributes of those who shall benefit from a reminder are as follows:
... This is admonishment for all who believe in Allah and the Last Day... (Surat at-Talaq: 2)
He who has fear will be reminded; (Surat al-A'la: 10)
... It is only people of intelligence who pay heed. (Surat ar-Ra'd: 19)
... But none pay heed save those who repent. (Surah Ghafir: 13)
... So remind, with the Qur'an, whoever fears My Threat. (Surah Qaf: 45)
And remind them, for truly the believers benefit from being reminded. (Surat adh-Dhariyat: 55)