divided against itself
In perpetual disagreement, as of the members of a group. The phrase is derived from "a house divided against itself cannot stand," a Bible verse (Mark 3:25) that was popularized in an 1858 speech by Abraham Lincoln. The candidate urged the members of his political party to unite because he understood that a house divided against itself cannot stand.
divided against itself
(of a group which should be a unified whole) split by factional interests. This expression originates in Jesus's words in Matthew 12:25: ‘every city or house divided against itself shall not stand’.