1 The Lord challenges the exiles (Zion’s children) to bring incriminating evidence against him. The rhetorical questions imply that Israel accused the Lord of divorcing his wife (Zion) and selling his children (the Israelites) into slavery to pay off a debt.
2 The Lord admits that he did sell the Israelites, but it was because of their sins, not because of some debt he owed. If he had sold them to a creditor, they ought to be able to point him out, but the preceding rhetorical question implies they would not be able to do so.
3 The Lord admits he did divorce Zion, but that too was the result of the nation’s sins. The force of the earlier rhetorical question comes into clearer focus now. The question does not imply that a certificate does not exist and that no divorce occurred. Rather, the question asks for the certificate to be produced so the accuser can see the reason for the divorce in black and white. The Lord did not put Zion away arbitrarily.

In other versions

Thus says the Lord:

“Where is your mother’s certificate of divorce,

with which I sent her away?

Or which of my creditors is it

to whom I have sold you?

Behold, for your iniquities you were sold,

and for your transgressions your mother was sent away.

This is what the Lord says:

“Where is your mother’s certificate of divorce

with which I sent her away?

Or to which of my creditors

did I sell you?

Because of your sins you were sold;

because of your transgressions your mother was sent away.

This is what the Lord says:

Where is your mother’s divorce certificate

that I used to send her away?

Or to which of my creditors did I sell you?

Look, you were sold for your iniquities,

and your mother was sent away

because of your transgressions.

This is what the Lord says:

“Was your mother sent away because I divorced her?

Did I sell you as slaves to my creditors?

No, you were sold because of your sins.

And your mother, too, was taken because of your sins.

Thus says Yahweh:

“Where is this divorce document of your mother’s divorce, with which I dismissed her?

or to whom of my creditors did I sell you?

Look! you were sold because of your sin,

and your mother was dismissed because of your transgressions.

Thus saith the Lord,

Where is the bill of your mother’s divorcement, whom I have put away?

Or which of my creditors is it to whom I have sold you?

Behold, for your iniquities have ye sold yourselves,

And for your transgressions is your mother put away.

Public Domain