George Haydock's Catholic Commentary
Psalms 118:164
Seven. Often, (Worthington) as the word signifies, Proverbs xxiv. 16., &. (Vatable) --- Yet here it may determine the precise number, as the Church seems to have taken it, by instituting the seven canonical hours of the day, and matins and lauds for the night, in imitation of the psalmist. (Berthier; ver. 147) --- R. Solomon understands it literally, prescribing prayer twice before the reading of the decalogue, and once after in the morning; and in the afternoon, twice before and after the same lecture. The Church has enjoined matins to be said at night, lauds in the morning, prime, tierce, sext, none, vespers and complin, in the course of the day. (St. Benedict, reg. 8., and 16.) (Calmet) --- This ecclesiastical office consists of hymns, psalms, &c. (St. Isidore) --- Against it some have risen up, particularly against that part which was said in the night, pretending that God had made the night for rest; and hence they were called nuctazontes, or "drowsy" heretics. (St. Isidore, Of. i. 22.) --- St. Jerome styles Vigilantius Dormitantius, for the same reason; as if it were better to sleep than to watch. Wycliff (Wald. iii. Tit. iii. 21.) and Luther have oppugned the same holy practice, though it be so conformable to Scripture and to the fathers. (St. Basil, reg. fus. 37.; St. Gregory, dial. iii. 14.; Ven. Bede, Hist. iv. 7., &c.) --- St. Clement, as many suppose, (Worthington) or at least some author before the fourth century, (Haydock) explains the reason why we should pray at these set times; but cautions us not to join with heretics, neither in the Church nor at home. (Apostolic Constitutions viii. 40.) --- For what society is there between light and darkness? (2 Corinthians vi.) St. Cyprian, (or. Dom.) St. Jerome, (ep. ad Eust.) and St. Augustine (ser. 55. de Temp.) mention several of these hours, and exhort the faithful to be diligent in attending these public prayers. (Worthington)