Tell Your Brother You Love Him
Abu Karimah Al-Miqdad bin Ma’dikarib (radi Allahu anhu) reported that the Prophet (sal Allahu alaihi wa sallam) said, “When a man loves his brother (for the sake of Allah) let him tell him that he loves him.”
[At-Tirmidhi and Abu Dawud]
The wisdom behind informing someone that one loves him for the sake of Allah, is to make him aware of the regard shown to him so that this will turn into mutual affection and will, therefore, promote cooperation with each other.
And Allah Knows Best!