In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
“If one of you loves his brother for the sake of Allaah, let him make that known to him, for indeed it is good for [the close] bond [between them] and makes the love more lasting”. [Silsilah As-Saheehah 1199]
Beneficial Reminder From This Hadeeth By Shaikh Zayd Bin Haadi [rahimahullaah]
It is part of good manners to love for the sake of Allaah and hate for the sake of Allaah. Those who love one another for the sake of Allaah are the pious and good people – those who adhere to the Book of Allaah [i.e. the Qur’aan] and the authentic Sunnah of Allaah’s Messenger [sallal laahu alayhi wasallam], regardless whether they are associated with you through lineage, or [they are your] neighbour, or [associated with you] through companionship, or there is no association between you and them [due to anything else] other than brotherhood based on Eemaan, Islaam and Ihsaan. Therefore, if you love a person due to something which should bring about love and is judged based on the Sharee’ah, then inform him that you love him for the sake of Allaah. If you tell him, he’ll return to you the love that is based on the Sharee’ah, become close to you, eager to be in touch with you – either by approaching you in person or via written correspondence- and by way of this, closeness will exist between you and him. This will not only exist in the worldly life, rather it will exist both in the worldly life and the afterlife. In a hadeeth Qudsi, Allaah [The Mighty and Majestic] said, “My love is guaranteed for two people who love one another for My sake; for those who sit with one another for My Sake; those who visit one another for My Sake and those who support one another [i.e. with kindness, wealth etc] for My Sake. [Ref 1] [End of Quote]
What do you say to a person if you love them for the sake of Allaah? You say: [أحبك في الله – I love you for the sake of Allaah]. What should be their reply? [أحبك الله الذى أحببتني فيه – May Allaah for whose sake you love me, (also) love you].
Ref 1: Source: At-taleeqaat Al-Maleehah Alaa Sisilah al-Ahaadeeth As-Saheehah. Vol 1. Page 51. Slightly paraphrased