9 A few important (א Φ pc) have the name “Jesus” here, but it is probably not original. Nevertheless, this translation routinely specifies the referents of pronouns to improve clarity, so that has been done here. Grk “He”; the referent (Jesus) has been specified in the translation for clarity.
10 Grk “heart” (a collective singular).

In other versions

He said to them, “Because of your hardness of heart Moses allowed you to divorce your wives, but from the beginning it was not so.

Jesus replied, “Moses permitted you to divorce your wives because your hearts were hard. But it was not this way from the beginning.

He told them, “Moses permitted you to divorce your wives because of the hardness of your hearts, but it was not like that from the beginning.

Jesus replied, “Moses permitted divorce only as a concession to your hard hearts, but it was not what God had originally intended.

He said to them, “Moses, with reference to your hardness of heart, permitted you to divorce your wives, but from the beginning it was not like this.

He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.

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