Psalms 61:12

Once, by the generation of his word, (St. Augustine) or when he promulgated the law, Exodus xx. 6. (Berthier) --- God's word is invariable, (Worthington; Job xxxiii. 14.; Menochius) and will be put in execution. (St. Ambrose) (Tirinus) --- This he has often inculcated. (Vatable) (Job xxxix. 35.) Amos (i. 3.) uses three and four, in the same sense. (Calmet)