Adam Clarke on Exodus 22:16

If a man entice a maid - This was an exceedingly wise and humane law, and must have operated powerfully against seduction and fornication; because the person who might feel inclined to take the advantage of a young woman knew that he must marry her, and give her a dowry, if her parents consented; and if they did not consent that their daughter should wed her seducer, in this case he was obliged to give her the full dowry which could have been demanded had she been still a virgin. According to the Targumist here, and to Deu 22:29, the dowry was fifty shekels of silver, which the seducer was to pay to her father, and he was obliged to take her to wife; nor had he authority, according to the Jewish canons, ever to put her away by a bill of divorce. This one consideration was a powerful curb on disorderly passions, and must tend greatly to render marriages respectable, and prevent all crimes of this nature.