The Bible addresses marriage directly in several passages:
Genesis 2:24 (KJV)
24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
Matthew 19:4-6 (KJV)
4 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, 5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh? 6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
Ephesians 5:25-33 (KJV)
25 Husbands, love your wives, even as Christ also loved the church, and gave himself for it; 28 So ought men to love their wives as their own bodies. He that loveth his wife loveth himself. 33 Nevertheless let every one of you in particular so love his wife even as himself; and the wife see that she reverence her husband.
1 Corinthians 13:4-7 (KJV)
4 Charity suffereth long, and is kind; charity envieth not; charity vaunteth not itself, is not puffed up, 7 Beareth all things, believeth all things, hopeth all things, endureth all things.