Albert Barnes on John 15:25

In their law, Ps 35:19. All the Old Testament was sometimes called the law. The meaning here is that the same thing happened to him which did to the psalmist. The same words which David used respecting his enemies would express, also, the conduct of the Jews and their treatment of the Messiah. In both cases it was without cause. Jesus had broken no law, he had done no injury to his country or to any individual. It is still true that sinners hate him in the same way. He injures no one, but, amid all their hatred, he seeks their welfare; and, while they reject him in a manner for which they can give no reason in the day of judgment, he still follows them with mercies and entreats them to return to him. Who has ever had any reason to hate the Lord Jesus? What injury has he ever done to any one of the human race? What evil has he ever said or thought of any one of them? What cause or reason had the Jews for putting him to death? What reason has the sinner for hating him now? What reason for neglecting him? No one can give a reason for it that will satisfy his own conscience, none that has the least show of plausibility. Yet no being on earth has ever been more hated, despised, or neglected, and in every instance it has been "without a cause." Reader, do you hate him? If so, I ask you WHY? Wherein has he injured you? or why should you think or speak reproachfully of the benevolent and pure Redeemer?

(c) "They hated me without cause" Ps 35:19, 69:4