Dhammapada – What is the "beyond"?

In the chapter of the brahmin this is one of the paragraphs: > Whoever is Untied and free of distress, And for whom neither a "beyond," a "not-beyond," Nor a "both beyond-and-not-beyond" exist, I call a brahmin. What is the meaning of "beyond" here? What would be the "both-beyond-and-not-beyond"? Thanks.