What is the impact of brotherhood for the sake of Allah, and what poetry has been recited about it?

Brotherhood for the sake of Allah is one of Allah's great blessings and a fruit of faith. Allah Almighty said: (And remember the favor of Allah upon you – when you were enemies and He brought your hearts together so you became, by His favor, brothers). This brotherhood necessitates love, support, cooperation, mutual responsibility, compassion, altruism, spreading peace, and protection from harm. It has been said about kinship brotherhood what emphasizes its importance, and brotherhood for the sake of Allah takes precedence over it.