"When one of you loves his brother,then let him inform him of it."  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا أَحَبَّ أَحَدُكُمْ أَخَاهُ فَلْيُعْلِمْهُ إِيَّاهُ وَفِي الْبَابِ عَنْ أَبِي ذَرٍّ وَأَنَسٍ  

"When a man becomes the brother of another man,then let him ask him about his name and his father's name and who he is,for indeed it shall nurture affection."  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا آخَى الرَّجُلُ الرَّجُلَ فَلْيَسْأَلْهُ عَنِ اسْمِهِ وَاسْمِ أَبِيهِ وَمِمَّنْ هُوَ فَإِنَّهُ أَوْصَلُ لِلْمَوَدَّةِ