James 3:2

For we all make mistakes in many areas [of life]. If anyone does not make a mistake in what he says, he is a perfect person, capable of keeping a tight rein on his whole life also.

James 1:19

You people [already] know this [or, "you should know this"], my dearly loved brothers. However, every person should be quick to listen, slow to talk and slow in becoming angry.

Treasury of Scripture Knowledge

Summary

In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.

Bible References

But

James 1:19
You people [already] know this [or, "you should know this"], my dearly loved brothers. However, every person should be quick to listen, slow to talk and slow in becoming angry.
James 3:2
For we all make mistakes in many areas [of life]. If anyone does not make a mistake in what he says, he is a perfect person, capable of keeping a tight rein on his whole life also.