Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

Superscription of the primary collection. The origin of this superscription cannot be the same as that of the doxology, which is only inserted between it and the Psalm, because it was intended to be read with the Psalm at the reading in the course of the service (Symbolae, p. 19). כּלוּ = כּלּוּ, like דּחוּ in Ps 36:13, כּסּוּ, Psa 80:11, all being Pual forms, as is manifest in the accented ultima. A parallel with this verse is the superscription "are ended the words of Job" in Job 31:40, which separates the controversial speeches and Job's monologue from the speeches of God. No one taking a survey of the whole Psalter, with the many Psalms of David that follow beyond Ps 72, could possibly have placed this key-stone here. If, however, it is more ancient than the doxological division into five books, it is a significant indication in relation to the history of the rise of the collection. It proves that the collection of the whole as it now lies before us was at least preceded by one smaller collection, of which we may say that it extended to Ps 72, without thereby meaning to maintain that it contained all the Psalms up to that one, since several of them may have been inserted into it when the redaction of the whole took place. But it is possible for it to have contained Ps 72, wince at the earliest it was only compiled in the time of Solomon. The fact that the superscription following directly upon a Psalm of Solomon is thus worded, is based on the same ground as the fact that the whole Psalter is quoted in the New Testament as Davidic. David is the father of the שׁיר ה, Ch2 29:27, and hence all Psalms may be called Davidic, just as all משׁלים may be called Salomonic, without meaning thereby that they are all composed by David himself.