Of course such an instrument is a very ineffective one, and can but scratch, rather than plough the ground, the warmth of the climate and fertility of the land rendering needless the deep ploughing of our own country, where the object is to turn up the earth to the greatest possible depth. One yoke of oxen was generally sufficient to draw a plough, but occasionally a much greater number were required. We read, for example, of Elisha, who, when he received his call from Elijah, was ploughing with twelve yoke of oxen, i.e. twenty-four. It has been suggested, that the twelve yoke of oxen were not all attached to the same plough, but that there were twelve ploughs, each with its single yoke of oxen. This, however, was scarcely likely to be the case, as it is definitely stated that Elisha "was ploughing with twelve yoke of oxen before him, and he with the twelfth," and it is much more probable that the land was heavy, and that, therefore, the plough could not be properly worked without the additional force. The instrument with which the cattle were driven was not a whip, but a goad. This goad was a long and stout stick, armed with a spike at one end, and having a kind of spud at the other, with which the earth could be scraped off the share when it became clogged. Such an instrument might readily be used as a weapon, and, in the hands of a powerful man, might be made even more formidable than a spear. As a weapon, it often was used, as we see from many passages of the Scriptures. For example, it is said in Judges iii. 31, "that Shamgar the son of Anath killed six hundred Philistines with an ox-goad." Afterwards, in the beginning of Saul's reign, when the Israelites fairly measured themselves against the Philistines, it was found that only Saul and Jonathan were even tolerably armed. Fearful of the numbers and spirit of the Israelites, the Philistines had disarmed them, and were so cautious that they did not even allow them to possess forges wherewith to make or sharpen the various agricultural instruments which they possessed, lest they should surreptitiously provide themselves with weapons. The only smith's tool which they were allowed to retain was a file with which each man might trim the edges of the ploughshares, mattocks, axes, and sharpen the points of the goad. The only weapons which they could muster were made of their agricultural implements, and among the most formidable of them was the goad.