'Undergarments' in the Bible

And the priest shall put on his linen robe, and he must put his linen undergarments on his body, and he shall take away the fatty ashes [of] the burnt offering that the fire has consumed on the altar, and he shall place them beside the altar.

He must put on {a holy linen tunic}, and linen undergarments must be on his body, and he must fasten [himself] with a linen sash, and he must wrap a linen turban around [his head]--they [are] holy garments, and he shall wash his body with water, then he shall put them on.