Charles H. Spurgeon on Psalms 132:17

I have ordained a lamp for mine anointed. This clause contains an allusion to the law, which cannot be preserved in any version. The word translated "lamp" is used to designate the several burners of the golden candlestick (Ex 25:37 35:14 37:23 39:87), and the verb here joined with it is the one applied to the ordering or tending of the sacred lights by the priests (Ex 27:21 Le 27:3). The meaning of the whole verse is, that the promise of old made to David and to Zion should be yet fulfilled, however dark and inauspicious present appearances. —Joseph Addison Alexander.