George Haydock's Catholic Commentary
Psalms 108:25
Heads, and saying, Vah, &c. (Matthew xxvii. 40.) as Semei insulted David, (2 Kings xvi. 5.; Calmet) though he is not said to have shaken his head, for which reason the prophecy may rather relate solely to Christ. (Berthier) --- "To pay our ransom, he was crucified; to be crucified, he was despised; and to be despised, he appeared in a state of abjection." (St. Augustine) --- These three steps were requisite, as the Jews would never have dared to lay hands on him, if he had appeared in glory. (Berthier)