Adam Clarke on Psalms 27:4

One thing have I desired - If I am grown too old, and from that circumstance unable to serve my country, I shall then prefer a retirement to the tabernacle, there to serve God the rest of my days. There I shall behold his glory, and there I may inquire and get important answers respecting Israel.

But though these words may be thus interpreted, on the above supposition, that David penned the Psalm on the occasion of his escape from the Philistine, and the desire expressed by his subjects that he should go no more out to war; yet it appears that they more naturally belong to the captivity, and that this verse especially shows the earnest longing of the captives to return to their own land, that they might enjoy the benefit of Divine worship.