Mishkat al-Masabih

Ibn ‘Abbas reported God’s Messenger as saying, “There are three whose prayer is not raised a span above their heads:a man who acts as imam for people when they do not like him, a woman with whom her husband is displeased throughout the night, and two brothers* who are disunited.” * The word here is most probably used in the widest sense, meaning two Muslims. Ibn Majah transmitted it.