Salvation belongeth unto the Lord - It is God alone who saves. He is the fountain whence help and salvation come; and to him alone the praise of all saved souls is due. His blessing is upon his people. Those who are saved from the power and the guilt of sin are his people. His mercy saved them; and it is by his blessing being continually upon them, that they continue to be saved. David adds his selah here also: mark this!
These are great truths; mark them!
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A Psalm of David - literally, belonging to David; that is, belonging to him as the author. This is marked in the Hebrew as the first verse, and so in the Syriac version, the Latin Vulgate, and the Septuagint, making in the Hebrew, and in each of these versions, nine verses in the psalm instead of eight, as in our translation. This may have been prefixed to the psalm by the author himself, for it was not uncommon in ancient times for an author to prefix his name to his own composition, as is commonly done by the apostle Paul in his epistles. It is not absolutely certain, however, that this was done in the Psalms by the authors themselves, but it may have been done by him who collected and arranged the Psalms, indicating the prevalent belief in regard to the authorship, and under the Spirit of inspiration.
When he fled - On the occasion of his fleeing. That is, it was composed at that time, or was subsequently composed in remembrance of it. See Introduction, Section 2.
From Absalom his son - See the introduction, Section 2.
Salvation belongeth unto the Lord - That is, it pertains to God alone to save. The psalmist had no expectation of saving himself; he had no confidence in the unaided prowess of his own arm. If he was to be saved he felt that it was to be only by God, and the praise of this was to be given to Him. The particular reference here is to temporal deliverance, or deliverance from the dangers which surrounded him then; but the declaration is as true of spiritual deliverance - of the salvation of the soul - as it is of deliverance from temporal danger. In both cases it is true that God only saves, and that all the praise is due to him.
Thy blessing is upon thy people - Or perhaps, rather, “thy blessing be upon thy people,” regarding this as a “prayer” rather than an “affirmation.” It is true, indeed, as an affirmation (compare Psalm 2:12); but it accords better with the connection here, and is a more appropriate conclusion of the psalm to regard it as a petition, expressing an earnest desire that the blessing of God might ever rest upon his own people. Then the thoughts of the psalmist are turned away from his own perils to the condition of others; from his individual case to that of the Church at large; and he prays that all others may find the same favors from God which he had so richly enjoyed, and which he hoped still to enjoy. It is one of the characteristics of true piety thus to turn from our own condition to that of others, and to desire that what we enjoy may be partaken of by the people of God everywhere.
“For Thou hadst cast me into the deep,
In the midst of the seas;
And the floods compassed me about:
And Thy billows and Thy waves passed over me.
PK 269.1
“Then I said, I am cast out of Thy sight;
Yet I will look again toward Thy holy temple.
The waters compassed me about,
Even to the soul:
PK 269.2
“The depth closed me round about,
The weeds were wrapped about my head.
I went down to the bottoms of the mountains;
The earth with her bars was about me forever:
PK 269.3