The Talmud (loc cit.) is of opinion that it is because the fatal נפלה (Amo 5:2), which David, going on at once with סומך ה לכל־הנפלים, skips over, begins with Nun. On the other hand, Ewald, Vaihinger, and Sommer, like Grotius, think that the Nun-strophe has been lost. The lxx (but not Aquila, Symmachus, Theodotion, nor Jerome in his translation after the original text) gives such a strophe, perhaps out of a MS (like the Dublin Cod. Kennicot, 142) in which it was supplied: Πιστὸς (נאמן as in Psa 111:7) κύριος ἐν (πᾶσι) τοῖς λόγοις αὐτοῦ καὶ ὅσιος ἐν πᾶσι τοῖς ἔργοις αὐτοῦ (according with Psa 145:17, with the change only of two words of this distich). Hitzig is of opinion that the original Nun-strophe has been welded into Psa 141:1-10; but only his clairvoyant-like historical discernment is able to amalgamate Psa 145:6 of this Psalm with our Psalms 145. We are contented to see in the omission of the Nun-strophe an example of that freedom with which the Old Testament poets are wont to handle this kind of forms. Likewise there is no reason apparent for there fact that Jeremiah has chosen in Lam 2:1, Lam 3:1, and Lam 4:1 of the Lamentations to make the Ajin-strophe follow the Pe-strophe three times, whilst in Lam 1:1 it precedes it.
Verses 1-7
The strains with which this hymn opens are familiar Psalm-strains. We are reminded of Psa 30:2, and the likewise alphabetical song of praise and thanksgiving Psa 34:2. The plena scriptio אלוהי in Psa 143:10; Psa 98:6. The language of address “my God the King,” which sounds harsh in comparison with the otherwise usual “my King and my God” (Psa 5:3; Psa 84:4), purposely calls God with unrelated generality, that is to say in the most absolute manner, the King. If the poet is himself a king, the occasion for this appellation of God is all the more natural and the signification all the more pertinent. But even in the mouth of any other person it is significant. Whosoever calls God by such a name acknowledges His royal prerogative, and at the same time does homage to Him and binds himself to allegiance; and it is just this confessory act of exalting Him who in Himself is the absolutely lofty One that is here called רומם. But who can the poet express the purpose of praising God's Name for ever? Because the praise of God is a need of his inmost nature, he has a perfect right to forget his own
