Sunan Ibn Majah Book 5, Hadith 169
“There are three whose prayer do not rise more than a hand span
above their heads: A man who leads people (in prayer) when they do
not
like him; a woman who has spent the night with her husband angry
with
her; and two brothers who have severed contact with one
another.”
“The Messenger of Allah (ﷺ) said: ‘There are three whose prayer are not accepted: A man who leads people while they do not like him; a man who does not come to prayer until its end – meaning after its time has expired – and one who enslaves a freed person.’”
“The Messenger of Allah (ﷺ) said: ‘Two or more people are a congregation.’”