2 verses have
brethren
in Edition Clear Qur'an by Talal Itani / Al-Hashr (The Exile)

59:10And those who came after them, saying, “Our Lord, forgive us, and our brethren who preceded us in faith, and leave no malice in our hearts towards those who believe. Our Lord, You are Clement and Merciful.”

59:11Have you not considered those who act hypocritically? They say to their brethren who disbelieved among the People of the Book, “If you are evicted, we will leave with you, and will not obey anyone against you; and should anyone fight you, we will certainly support you.” But God bears witness that they are liars.