The word divorce is used 5 times in the law according to KJV.
Leviticus 21:14 deals with who a priest can marry
Leviticus 22:13 deals with the daughter of a priest who is divorced.
Numbers 30:9 deals with a divorced woman's vows
Deuteronomy 24:1 this is one you will be interested in -- continue to read until the entire law is complete
this will go into the obligations of the husband to a new wife.