Divorce is addressed by Jesus in Matthew 19 and by the prophet Malachi; the biblical text is presented here neutrally.
In Matthew 19:6:
6 Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
In Matthew 19:9:
9 And I say unto you, Whosoever shall put away his wife, except it be for fornication, and shall marry another, committeth adultery: and whoso marrieth her which is put away doth commit adultery.
In Malachi 2:16:
16 For the LORD, the God of Israel, saith that he hateth putting away: for one covereth violence with his garment, saith the LORD of hosts: therefore take heed to your spirit, that ye deal not treacherously.