Exodus 20:26

With the same object, to prevent exposure of the person, it is afterwards prescribed that the priests be provided with linen drawers while officiating at the altar: see Exodus 28:42; Exodus 28:43. The top of the altar of burnt offering, which was four and a half ft. high, was reached, according to tradition, by means of a sloping ramp of earth: cp. Exodus 27:5, and see on Leviticus 9:22.