Charles H. Spurgeon on Psalms 132:2

And vowed. The history does not record the time nor the occasion of this vow; but history does record how it was ever in David's thoughts and on David's heart. David, indeed, in the first verse, asks of God to remember his afflictions, and then records his vow; and you may, perhaps, think that the vow was the consequence of his afflictions, and that he made it contingent on his deliverance ...It is far more consistent with the character of David to look upon the affliction to which he alludes as resulting from the Lord's not permitting him to carry out his purpose of erecting an earthly habitation for the God of heaven, inasmuch as he had shed blood abundantly. And if, as is more than probable, amid that blood which he had shed, David's conscience recalled the blood of Uriah as swelling the measure, he could not but be deeply afflicted, even while he acknowledged the righteousness of the sentence. But though not permitted of God to execute his purpose, we cannot but feel and own that it was a noble resolution which David here makes; and though recorded in all the amplification of Oriental imagery, it expresses the holy determination of the Psalmist to forego every occupation and pursuit, and not to allow a single day to elapse till he had at least fixed on the site of the future temple. —Barton Bouchier.