Tafsiran Mazmur 2:7: Rashi, Radak & Ibn Ezra

I will tell of the decree Said David, “This is an established decree, and [one] that I have received to tell this and to make known.”

Let me declare it for a decree: – This is the utterance of David, who says, I will make this declaration a decree and rule. And what is the declaration? That

Let me tell (אֲסַפְּרָ֗ה - asapperah): These are the words of David along with his prophecy; or, the words of the poet [who composed the psalm] speaking on his [David's, or the Messiah's] behalf.

The Lord said to me through Nathan, Gad, and Samuel.

You are My son The head over Israel, who are called “My firstborn son.” And they will endure through you, as is stated concerning Abner (II Sam. 3:18): “for God said, etc., ‘By the hand of My bondsman David shall I deliver...Israel.’” And for their sake, you are before Me as a son because they are all dependent upon you.

this day have I for I have enthroned you over them.