He shall subdue the people under us - Compare Psalms 18:39, note; Psalms 18:47, note. The word rendered “subdue” is that which commonly means” to speak.” The idea in the use of this word here is that he has only to speak and it is done (compare Psalms 33:9), or that he could do it by a word. Compare, however, on the use of the word here, Gesenius (Lexicon), on the word - דבר dâbar, 2, Hiphil.
And the nations under our feet - That is, they shall be entirely or effectually subdued. See Psalms 7:5, note; Psalms 44:5, note. As God would enable them to do this, it was an occasion for thankfulness and triumph.