Amos 6:12

Shall horses run upon the rock? “Is it possible that horses should run upon the steep and craggy cliffs? So impossible is it that ye Israelites should continue to prosper, while ye remain thus sinful.” Bishop Hall. Or, “as horses and oxen are useless in such places, so are ye evidently useless to God.” Grotius. Several other interpretations are given of this obscure verse. Mr. Scott's is, “It was as perilous to endeavour to reform the people as it would be to ride a race on the top of a craggy rock, where both horses and horsemen would be in danger of being killed; and as vain as to plough there with oxen, when no impression could be made or increase expected.” For ye have turned judgment into gall, &c. Ye have rendered the administration of public justice as bitter as gall, and the fruit of righteousness, or the observance of religious ceremonies, as poisonous as hemlock.