George Haydock's Catholic Commentary
Psalms 54:19
Among many, &c. That is, they that drew near to attack me, were many in company, all combining to fight against me. (Challoner) --- Or, many also joined themselves to me with Joab, and the holy angels, (4 Kings vi. 16.) though almost all Israel followed Absalom, 2 Kings xv. 13. (Calmet) --- In many things, schismatics agree with the Church; but their crime is the breaking of unity. (St. Augustine)