עַתָּ֤ה יָדַ֗עְתִּי כִּ֤י הוֹשִׁ֥יעַ ׀ יְהוָ֗ה מְשִׁ֫יח֥וֹ יַ֭עֲנֵהוּ מִשְּׁמֵ֣י קָדְשׁ֑וֹ בִּ֝גְבֻר֗וֹת יֵ֣שַׁע יְמִינֽוֹ׃
Now know I that the LORD saveth His anointed; He will answer him from His holy heaven With the mighty acts of His saving right hand.
Rashi on Psalms
Now I know This is the praise that we will sing now for this salvation that came to Joab and to Israel: I know that the Omnipresent desired me and has answered me from His holy heavens, for their salvation is my salvation.