1 Corinthians 11:19
For there also must be factions among you, that those who are approved may be revealed among you.
World English Bible (Public Domain)
In context
Before · 1 Corinthians 11:17–18
17But in giving you this command I don’t praise you, because you come together not for the better but for the worse. 18For first of all, when you come together in the assembly, I hear that divisions exist among you, and I partly believe it.
19For there also must be factions among you, that those who are approved may be revealed among you.