'Betrothed' in the Bible

“If a man seduces a virgin who is not betrothed, and lies with her, he must pay a dowry (marriage price) for her to be his wife.

‘Now if a man has intimate relations with a woman who is a slave acquired for [marriage to] another man, but who has not been redeemed nor given her freedom, there shall be punishment [after an investigation]; they shall not be put to death, because she was not free;

And who is the man who is engaged (legally promised) to a woman and has not married her? Let him go and return to his house, otherwise he might die in the battle and another man would marry her.’

“However, if the man finds the girl who is engaged (legally betrothed) in the [open] field, and seizes her and is intimate with her [by force], then only the man who lies with her shall be put to death.

When he found her in the [open] field, the engaged girl [may have] cried out for help, but there was no one to [hear and] save her.

“If a man finds a girl who is a virgin, who is not engaged, and seizes her and is intimate with her and they are discovered,

So David sent messengers to Ish-bosheth, Saul’s son, saying, “Give me my wife Michal, to whom I was betrothed for [the price of] a hundred foreskins of the Philistines.”

And I said to her, “You shall stay with me for many days. You shall not play the prostitute nor shall you have a man; so I will also be toward you [until you have proved your faithfulness].”