WE RELATE FROM the book of Ibn as-Sunnī that Abū Rāfi‘ 
, the freed slave of the Messenger of Allah 
, reported that the Messenger of Allah said: “If the ear of any of you rings, he should remember me, pray for blessings upon me, and say: ‘May Allah remember with goodness whoever remembers me.’” [1].
, the freed slave of the Messenger of Allah , reported that the Messenger of Allah said: “If the ear of any of you rings, he should remember me, pray for blessings upon me, and say: ‘May Allah remember with goodness whoever remembers me.’” [1].
Dhakara-llāhu bi-khayrin man dhakaranī.
References
[1] Ibn as-Sunnī (165) and al-Futūḥāt (6/198). As-Sakhāwī grades the chain of narrators as weak (ḍa‘īf).