Matthew Poole and continuators on Psalms 110:5

5 The Lord at thy right hand shall strike thorow kings in the day of his wrath .

Either, 1. God the Father, whose words and oath he last mentioned, v. 4. So this is an Apostrophe of the Psalmist to Christ, Thy God and Father is at thy right hand, to wit, to defend and assist thee, as that phrase is used Psal. 16. 8. & 109. 31. and elsewhere. See the Notes on v. 1. And he, to wit, God the Father, shall strike, &c. as it follows. Although this latter clause may belong to the Messias; and as in the former he spake to him, so in this he speaketh of him; such changes of persons being very frequent in this Book. Or, 2. God the Son, or the Lord, who is at thy right hand, as was said before v. 1. shall strike, &c. So this is an Apostrophe to God the Father concerning his Son. This seems best to agree with the following verses; for it is evident that it is the same person who strikes thorow Kings, and judgeth among the heathen, and filleth, &c. And so this whole verse, and those which follow, speak of one person, which seems most probable.

Shall mortally wound and destroy all those Kings and Potentates who are obstinate enemies to him and to his Church.

In the day of battel, when he shall contend with them, and pour forth the flouds of his wrath upon them.