Psalms 118:19 - Ellicott's Commentary On The Whole Bible

The gates of righteousness. — This is explained by the next verse as the gate of the Temple, where the righteous, i.e., Israel alone, entered. There does not seem the least reason for taking the words here in any but this literal sense, though doubtless they are capable of endless spiritual applications. We must imagine a procession chanting the triumphal song as in Psalms 24, and summoning the gates to open on its approach.