George Haydock's Catholic Commentary
Psalms 54:15
Consent, or with expedition, as the Rabbins order people to go to the temple, though they must return slowly. All this designates Judas. (Calmet) --- Dreadful lesson for all sacred ministers, who prove faithless! (Berthier) participating of the holy sacraments of the Catholic Church, (Worthington) and yet betraying themselves, and their master! Achitophel had probably to attend David in the temple, as Naaman did Benadad, 4 Kings v. 18. (Haydock)