Matthew 19:4-6
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4He answered, "Haven`t you read that he who made them from the beginning made them male and female, 5and said, `For this cause a man will leave his father and mother, and will join to his wife; and the two will become one flesh?` 6So that they are no more two, but one flesh. What therefore God has joined together, don`t let man tear apart."
Matthew 19:4-6 (WEB)