Following are a few suggested scripture readings that are quite appropriate for biblical wedding vows.
Old Testament:
Genesis 2:18-24
Ruth 1:16-17
Ruth 4
Proverbs 5:15-19
Proverbs 18:22
Ecclesiastes 4:9-12
Song of Solomon 2:10-13
Song of Solomon 8:6-7
New Testament:
Matthew 19:5-6
Mark 10:6-9
John 2:1-12
Romans 12:9-12
I Corinthians 7
I Corinthians 11:3
I Corinthians 11:8-9
I Corinthians 13:4-8
II Corinthians 6:14
Ephesians 3:14-19
Ephesians 5:22-33
Colossians 3:12-19
Hebrews 13:4
I Peter 3:1-7
I John 4:7-8
I John 4:12
Revelation 19:7-9