John Gill Commentary 2 Samuel 15:3

"And Absalom said unto him, See, thy matters are good and right; but there is no man deputed of the king to hear thee." — 2 Samuel 15:3 (ASV)

And Absalom said to him After some further talk, and finding he had a suit at law to bring on, and either seeing it drawn up in writing, or hearing his account of it, at once declared, without hearing the other party:

see, your matters [are] good and right; your cause is a good cause, and if it could be heard by proper persons there is no doubt but things would go on your side, and you would carry your cause:

but [there is] no man [deputed] of the king to hear you; the king is grown old himself and his sons are negligent, and do not attend to business, and there are none besides them appointed to hear causes; and he suggested, as appears by what follows, that he was not in commission, but if he was, or should he appointed a judge, he would attend to business, and people should not go away after this manner, without having justice administered to them,