Jesus came to fulfill the Law, and divorce was not originally allowed, as He said.
Paul said Christians must not divorce, but if divorced, remain single or reconcile.
1Co 7:27 Art thou bound unto a wife? seek not to be loosed. Art thou loosed from a wife? seek not a wife.
1Co 7:28 But and if thou marry, thou hast not sinned; and if a virgin marry, she hath not sinned.
Paul says if you remarry, you have NOT sinned...