Psalms 132:4 - John Gill's Exposition of the Entire Bible

I will not give sleep to mine eyes, [or] slumber to mine eyelids. Not that he never would or did take any sleep till this thing was brought about he had so much at heart; but that he could not and would not suffer himself to sleep comfortably and quietly because of it. Aben Ezra interprets it of sleep at noon; the phrases express his great desire and solicitude to have this affair accomplished, and his eager and diligent pursuit of it; see Proverbs 6:4; of the eager desire of Christ to suffer and die for his people, that they might be brought near to God, and be his dwelling place, see Luke 12:50.