Cross reference
John 20:30
30 Many indeed, therefore, other signs also did Jesus before his disciples, that are not written in this book;
John 21:25
25 And there are also many other things -- as many as Jesus did -- which, if they may be written one by one, not even the world itself I think to have place for the books written. Amen.
Luke 1:3-4
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,
4 that thou mayest know the certainty of the things wherein thou wast instructed.
John 2:11
11 This beginning of the signs did Jesus in Cana of Galilee, and manifested his glory, and his disciples believed in him;
Romans 15:4
4 for, as many things as were written before, for our instruction were written before, that through the endurance, and the exhortation of the Writings, we might have the hope.
1 Corinthians 10:11
11 And all these things as types did happen to those persons, and they were written for our admonition, to whom the end of the ages did come,
2 Timothy 3:15-17
15 and because from a babe the Holy Writings thou hast known, which are able to make thee wise -- to salvation, through faith that `is' in Christ Jesus;
16 every Writing `is' God-breathed, and profitable for teaching, for conviction, for setting aright, for instruction that `is' in righteousness,
17 that the man of God may be fitted -- for every good work having been completed.
2 Peter 3:1-2
1 This, now, beloved, a second letter to you I write, in both which I stir up your pure mind in reminding `you',
2 to be mindful of the sayings said before by the holy prophets, and of the command of us the apostles of the Lord and Saviour,
1 John 1:3-4
3 that which we have seen and heard declare we to you, that ye also may have fellowship with us, and our fellowship `is' with the Father, and with His Son Jesus Christ;
4 and these things we write to you, that your joy may be full.
1 John 5:13
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.