28:15 The rational of judgment: This part of the priest's attire, which he wore at his breast, was called the rational of judgment; partly because it admonished both priest and people of their duty to God, by carrying the names of all their tribes in his presence; and by the Urim and the Thummim, that is, doctrine and truth, which were written upon it; and partly because it gave divine answers and oracles, as if it were rational and endowed with judgment.