Albert Barnes Commentary Psalms 110:5

"The Lord at thy right hand Will strike through kings in the day of his wrath." — Psalms 110:5 (ASV)

The Lord at your right hand - See the notes at (Psalms 16:8).

Shall strike through kings - The Hebrew word here rendered “shall strike”—from מחץ mâchats—means “to shake, to agitate”; then, “to shake in pieces, to dash in pieces, to crush.” In this context, it has the sense of dashing in pieces, smiting, wounding, crushing.

The “kings” referred to are the enemies of God and the Messiah. The idea is that all would be subdued before him—that he would set up a universal dominion, that none would be able to stand before him, or that he would reign over all the earth.

The “language” is that which is derived from conquests in war, from the subjugation of enemies by force of arms. Compare the notes at (Psalms 2:9–12) and the notes at (Isaiah 11:4).

In the day of his wrath - (Psalms 2:12).