Proverbs 22:21

To cause thee to know the certainty of sayings of truth, To return sayings of truth to those sending thee.

Luke 1:3-4

it seemed good also to me, having followed from the first after all things exactly, to write to thee in order, most noble Theophilus,

1 Peter 3:15

and the Lord God sanctify in your hearts. And be ready always for defence to every one who is asking of you an account concerning the hope that is in you, with meekness and fear;

John 20:31

and these have been written that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life in his name.'

1 John 5:13

These things I did write to you who are believing in the name of the Son of God, that ye may know that life ye have age-during, and that ye may believe in the name of the Son of God.

Treasury of Scripture Knowledge

Summary

That I might make thee know the certainty of the words of truth; that thou mightest answer the words of truth to them that send unto thee?

Answer

General references

Bible References

I

Luke 1:3
it seemed good also to me, having followed from the first after all things exactly, to write to thee in order, most noble Theophilus,
John 20:31
and these have been written that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life in his name.'
1 John 5:13
These things I did write to you who are believing in the name of the Son of God, that ye may know that life ye have age-during, and that ye may believe in the name of the Son of God.

Answer

1 Peter 3:15
and the Lord God sanctify in your hearts. And be ready always for defence to every one who is asking of you an account concerning the hope that is in you, with meekness and fear;

General references

Proverbs 18:20
From the fruit of a man's mouth is his belly satisfied, From the increase of his lips he is satisfied.