Job 39:8

The range of the mountains [is] his pasture
It ranges about the mountains for food; it looks about for it, as the word signifies, and tries first one place and then another to get some, it having short commons there;

and he searcheth after every green thing;
herb or plant, be it what it will that is green, it seeks after; and which being scarce in deserts and mountains, it searches about for and feeds upon it, wherever it can find it; grass being the peculiar food of these creatures, see ( Job 6:5 ) ; and which is observed by naturalists ^F24.