The word(s) "brother" appears 84 time(s) in 68 verse(s) in Quran in Mohsin Khan translation.

(61) Verily, this my brother (in religion) has ninety-nine ewes, while I have (only) one ewe, and he says: "Hand it over to me, and he overpowered me in speech."

(62) And remember (Hud) the brother of 'Ad, when he warned his people in Al-Ahqaf (the curved sand-hills in the southern part of Arabian Peninsula). And surely, there have passed away warners before him and after him (saying): "Worship none but Allah; truly, I fear for you the torment of a mighty Day (i.e. the Day of Resurrection)."

(63) The believers are nothing else than brothers (in Islamic religion). So make reconciliation between your brothers, and fear Allah, that you may receive mercy.

(64) O you who believe! Let not a group scoff at another group, it may be that the latter are better than the former. Nor let (some) women scoff at other women, it may be that the latter are better than the former. Nor defame one another, nor insult one another by nicknames. How bad is it to insult one's brother after having Faith [i.e. to call your Muslim brother (a faithful believer) as: "O sinner", or "O wicked"]. And whosoever does not repent, then such are indeed Zalimun (wrong-doers, etc.).

(65) O you who believe! Avoid much suspicion; indeed some suspicions are sins. And spy not, neither backbite one another. Would one of you like to eat the flesh of his dead brother? You would hate it (so hate backbiting) . And fear Allah. Verily, Allah is the One Who forgives and accepts repentance, Most Merciful.

(66) You (O Muhammad صلى الله عليه وسلم) will not find any people who believe in Allah and the Last Day, making friendship with those who oppose Allah and His Messenger (Muhammad صلى الله عليه وسلم), even though they were their fathers or their sons or their brothers or their kindred (people). For such He has written Faith in their hearts, and strengthened them with Ruh (proofs, light and true guidance) from Himself. And He will admit them to Gardens (Paradise) under which rivers flow to dwell therein (forever). Allah is pleased with them, and they with Him. They are the Party of Allah. Verily, it is the Party of Allah that will be the successful.

(67) And his wife and his brother,

(68) That Day shall a man flee from his brother,