1 Thessalonians 5:24

he that has called you, is faithful, and this he will effect.

1 John 4:1-3

Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.

Revelation 2:2

I know thy works, thy labour, and thy patience, and that thou canst not bear those who are evil: thou hast tried those who say they are apostles, but are not; and hast found them lyars:

Treasury of Scripture Knowledge

Summary

And if thou say in thine heart, How shall we know the word which the LORD hath not spoken?

Bible References

General references

1 Thessalonians 5:24
he that has called you, is faithful, and this he will effect.
1 John 4:1
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
Revelation 2:2
I know thy works, thy labour, and thy patience, and that thou canst not bear those who are evil: thou hast tried those who say they are apostles, but are not; and hast found them lyars: