The writer reflects on the first destruction of Jerusalem and the dispersion which followed (9:1-3). The title of the psalm is εἰς ἔλεγχον, translated as “For Proof” by Wright (OTP 2:660) but as “For Rebuke” in the Lexham LXX. The noun can have the sense of proving something to be true (in contrast to faith in Hebrews 11:1), but it is also an expression of strong disapproval, reproof or correction (BDAG; 2 Tim 3:16).
The psalmist acknowledges Israel was scattered among all the nations as a result of the righteous judgment of God. Israel had “neglected the Lord” (an articular infinitive, ἐν τῷ ἀποστῆναι). The verb can refer to a revolt (Acts 5:37) and the related noun (ἀποστασία) is often translated as a religious falling away, an apostasy. This is the sense of the word in the LXX (Deut 32:15; Jer 3:14). The writer is therefore acknowledging Israel’s guilt when they were sent into exile in 722 B.C. and 586 B.C. In Jeremiah 16:13 the Lord declared “I will hurl you out of this land into a land that neither you nor your fathers have known.” The writer of this Psalm is on the other side of that long exile and confesses the Lord to be righteous, and Israel to be lawless (ἀνομία, v. 2).

It is only the Lord who can cleanse the soul from sin (9:4-7). This section of the Psalm is important for understanding the use of righteousness (δικαιοσύνη) in the first century, especially in Romans and Galatians. Psalm of Solomon 9:5 says the one who does righteousness stores up life for himself with the Lord (ὁ ποιῶν δικαιοσύνην θησαυρίζει ζωὴν αὑτῷ παρὰ κυρίῳ), and the one who unrighteousness (ἀδικία) causes his own life to be destroyed. Daniel Falk observes this verse is often cited as the “clearest example of God’s mercy earned by conduct” and he cites Mark Siefrid, “the destiny of the individual can be said to be contingent on behavior” (Justification and Variegated Nomism, 1:41).
Falk however argues Psalms of Solomon 9 intends just the opposite, only the repentant sinner will receive mercy from God. In the very next verse the psalmist describes the repentant sinner calling on God and being cleansed and restored. Verse 7 specifically states “your goodness is upon those that sin, when they repent.” The first three verses acknowledges the rebellion of Israel resulted in the exile. For the writer of this Psalm, the only solution at the present time is to pursue righteousness while recognizing even the righteous still sin and need to call upon their Lord.
Therefore the Israel of the psalmist’s day ought to recognize they are still God’s people and put their hope in God’s covenant which he made with their ancestors (9:8-11). The writer grounds this in God’s character (he is both faithful and compassionate). Israel was chosen as God’s people and God has put his name on them.
The writer does not consider the possibility God has finally rejected his people since he is confident that even after the dispersion of 586 B.C. Israel is still God’s people. Assuming the Psalm was written after Israel came under Roman power in 63 B.C., the Psalm encourages people living under yet another foreign oppressor that they are still God’s people even if they are still living in the exile.
Although the writer does not explicitly blame the aristocratic priests for these crimes, it is likely only the priesthood could profane the Temple courts in this way. “Secret underground places” could refer to alternative worship, as it did in Ezekiel 8:7-18. In a vision, Ezekiel digs into the secret places in the Temple to witness the elders of Israel engaged in idolatry. There is little evidence the priesthood permitted idolatry in the Second Temple, so it may be the case the writer is covering the standard sins against God found in the prophets of the Old Testament.
In verse 5, Wright translates θλίβω as “persecution in OTP, but the verb does not necessarily connote a religious or political persecution. For example, Paul used the verb in 2 Corinthians 4:8 to describe his own troubles. Sometimes he was persecuted by the Jews or the Romans, but the verb refers to all sorts of troubles he faced. It is tempting hear an echo of the troubles faced by Pharisees under Alexander Jannaeus. Jannaeus arrested 800 of his enemies, many of whom were Pharisees. He crucified these men while he banqueted with his wife and concubines, viewing the executions (Antiq. 13.410-15). Unfortunately there is nothing in the psalm which clearly echoes this event.
The target of the psalmist are the profane “who sit in the council of the devout” (v. 1). The writer uses the word βέβηλος to describe these people, a word used in the Pastoral Epistles for the “pointless and empty talk” of elderly women (1 Tim 4:7, Titus 1:9). Paul warns Timothy to avoid this kind of frivolous talk (1 Tim 6:20, 2 Tim 2:16). The psalmist says these people are “excessive in words, excessive in appearance above everyone else.” They are harsh in their “condemnation of sinners at judgment” (v. 2) and they destroy with “agitating words” (4:12). The psalmist thinks these profane people are trying to impress people with “deeds of ridicule and contempt” (4:7, 19).