Commentary Critical and Explanatory on the Whole Bible - Joshua 4:20
20-24. those twelve stones, which they took out of Jordan, did Joshua pitch in Gilgal—Probably to render them more conspicuous, they might be raised on a foundation of earth or turf. The pile was designed to serve a double purpose—that of impressing the heathen with a sense of the omnipotence of God, while at the same time it would teach an important lesson in religion to the young and rising Israelites in after ages. read more
Thomas Coke Commentary on the Holy Bible - Joshua 4:20
Ver. 20. And those twelve stones—did Joshua pitch in Gilgal— Josephus relates the matter as if the Israelites had reared these stones in the form of an altar. It is more probable, that, in order to represent the number of the tribes, they were pitched each upon its basis, as so many small pillars, perhaps in three lines, and probably on an elevation. read more