ANSWER:

It is authentic.

Is this authentic?: Anas bin Malik reported:A man was with the Prophet(ﷺ)when another man passed by &former said:”O Messenger of Allah!I love this man(for Allah’s sake)”.RasoolAllah(ﷺ)asked”Have you informed him?”He said,”No”.RasoolAllah (ﷺ)said,”Tell him (that you love him)”.So he went up to the man & said to him,”I love you for the sake of Allah;” & the other replied,”May Allah,for Whose sake you love me love you.

Etiquette, Morals and Heart-Softeners |