Psalms 78:18 - Clarke's commentary and critical notes on the Bible

And they tempted God in their heart by asking meat for their lust. By asking meat for their lust - לנפשם lenaphsham, "for their souls," i.e., for their lives; for they said in their hearts that the light bread, the manna, was not sufficient to sustain their natural force, and preserve their lives. It seems, however, from the expression, that they were wholly carnal; that they had no spirituality of mind; they were earthly, animal, and devilish.