1 John 2:4 NIV

1 John 1:6 NIV
If we claim to have fellowship with him and yet walk in the darkness, we lie and do not live out the truth.

James 2:14-16 NIV
What good is it, my brothers and sisters, if someone claims to have faith but has no deeds? Can such faith save them? Suppose a brother or a sister is without clothes and daily food. If one of you says to them, “Go in peace; keep warm and well fed,” but does nothing about their physical needs, what good is it?

Titus 1:16 NIV
They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good.