ISB ~ Matthew 19 v9

And I say to you:Jesus invokes his own authority to forbid divorce and remarriage. Matthew’s account reflects Jewish cultural conditions, where men alone had the right to divorce (cf. 5:32). Mark more fully records Jesus’ statement that both men and women are forbidden to divorce and remarry (Mk 10:11-12; CCC 1614, 2382).

See essay:Jesus on Marriage and Divorce at Mt 19.