multiple marriages
Genesis Chapter 2:24
Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
Matthew Chapter 19:9
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.
Romans Chapter 7:3
So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.
1 Corinthians Chapter 7:2
Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
1 Timothy Chapter 3:2
A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach;
Hebrews Chapter 13:4
Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.
1 Peter Chapter 3:7
Likewise, ye husbands, dwell with them according to knowledge, giving honour unto the wife, as unto the weaker vessel, and as being heirs together of the grace of life; that your prayers be not hindered.