مَنْ زارَ أخاً لَهُ فِي اللّٰهِ تَعالَى لا لِرِياءٍ أوْ طَلَبِ مَحْمَدَةٍ كُتِبَ لَهُ بِكُلِّ خُطْوَةٍ عَشْرُ حَسَناتٍ. If a person sets out to visit a brother-in-religion of his, in order not to show off or to be praised, but just to obey God`s commandments, he will be rewarded bountifully, that is ten rewards for each step he takes.
Nawader Al-mujezat, page 63
Allahu AkbarHadith