לְדָוִד מִזְמוֹר נְאֻם ה' לַאדֹנִי שֵׁב לִימִינִי עַד אָשִׁית אֹיְבֶיךָ הֲדֹם לְרַגְלֶיךָ

A psalm for David. The utterance of the Lord to my master, the king: Sit on My right until I place your enemies as a stool for your feet. God tells the king to sit, as it were, and wait while He fights his wars for him.

מַטֵּה עֻזְּךָ יִשְׁלַח ה' מִצִּיּוֹן רְדֵה בְּקֶרֶב אֹיְבֶיךָ

The Lord will send your rod of strength from Zion; with that rod, or royal scepter, you shall rule among your enemies.

עַמְּךָ נְדָבֹת בְּיוֹם חֵילֶךָ בְּהַדְרֵי קֹדֶשׁ מֵרֶחֶם מִשְׁחָר לְךָ טַל יַלְדֻתֶיךָ

Your people will volunteer to fight for you on your day of battle in sacred glory, with great reverence. From the womb of the dawn, since the day of your birth, you were destined for this glory; yours is and will remain the dew, the freshness and vigor, of youth.

נִשְׁבַּע ה' וְלֹא יִנָּחֵם אַתָּה כֹהֵן לְעוֹלָם עַל דִּבְרָתִי מַלְכִּי צֶדֶק

In honor of the coronation, the psalmist declares: The Lord has sworn, and He will not renounce it; you are chief forever by My decree. The word kohen usually means priest, but the term can also refer to any leader or holder of a senior position of authority, like Malkitzedek.

אֲדֹנָי עַל יְמִינְךָ מָחַץ בְּיוֹם אַפּוֹ מְלָכִים

The Lord is at your right hand to assist you; He will crush kings who fight against you on the day of His wrath.

יָדִין בַּגּוֹיִם מָלֵא גְוִיּוֹת מָחַץ רֹאשׁ עַל אֶרֶץ רַבָּה

He will judge among the nations, smiting all their warriors, and make it full of corpses. God will destroy your enemies in war, to the extent that the enemy camp will be full of corpses, crushing the heads of the enemies over a broad land. The imagery is of maimed warriors strewn across the battlefield.

מִנַּחַל בַּדֶּרֶךְ יִשְׁתֶּה עַל כֵּן יָרִים רֹאשׁ

As for the warrior in your camp, he will drink peacefully, with no opposition, from the stream on the way. Thus will his head be raised confidently when he moves on to the battlefield.